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Finding the Fourth Proportional to 103,859.16, 143,280.70 and 65,592.12

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Solution

The fourth proportional to 103,859.16, 143,280.70 and 65,592.12 is: 90,488.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,859.16 : 143,280.70 = 65,592.12 : x
  2. Step 2: Convert to fraction form
    103,859.16/143,280.70 = 65,592.12/x
  3. Step 3: Cross multiply
    103,859.16x = 143,280.70 × 65,592.12
  4. Step 4: Simplify right side
    103,859.16x = 9,398,084,868.08
  5. Step 5: Solve for x
    x = 9,398,084,868.08/103,859.16
  6. Step 6: Final answer
    x = 90,488.74

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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.