Home / 103,781.28-143,221.68-61,376.16

Finding the Fourth Proportional to 103,781.28, 143,221.68 and 61,376.16

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Solution

The fourth proportional to 103,781.28, 143,221.68 and 61,376.16 is: 84,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,781.28 : 143,221.68 = 61,376.16 : x
  2. Step 2: Convert to fraction form
    103,781.28/143,221.68 = 61,376.16/x
  3. Step 3: Cross multiply
    103,781.28x = 143,221.68 × 61,376.16
  4. Step 4: Simplify right side
    103,781.28x = 8,790,396,747.15
  5. Step 5: Solve for x
    x = 8,790,396,747.15/103,781.28
  6. Step 6: Final answer
    x = 84,701.18

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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.