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Finding the Fourth Proportional to 103,758.71, 143,130.44 and 90,306.23

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Solution

The fourth proportional to 103,758.71, 143,130.44 and 90,306.23 is: 124,573.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,758.71 : 143,130.44 = 90,306.23 : x
  2. Step 2: Convert to fraction form
    103,758.71/143,130.44 = 90,306.23/x
  3. Step 3: Cross multiply
    103,758.71x = 143,130.44 × 90,306.23
  4. Step 4: Simplify right side
    103,758.71x = 12,925,569,944.75
  5. Step 5: Solve for x
    x = 12,925,569,944.75/103,758.71
  6. Step 6: Final answer
    x = 124,573.35

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Double scale
Find fourth proportional to 103,759.71, 143,131.82 and 90,307.23
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.