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Finding the Fourth Proportional to 103,665.60, 143,102.67 and 69,693.80

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Solution

The fourth proportional to 103,665.60, 143,102.67 and 69,693.80 is: 96,207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665.60 : 143,102.67 = 69,693.80 : x
  2. Step 2: Convert to fraction form
    103,665.60/143,102.67 = 69,693.80/x
  3. Step 3: Cross multiply
    103,665.60x = 143,102.67 × 69,693.80
  4. Step 4: Simplify right side
    103,665.60x = 9,973,368,146.93
  5. Step 5: Solve for x
    x = 9,973,368,146.93/103,665.60
  6. Step 6: Final answer
    x = 96,207.11

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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.