Home / 87,770.43-121,127.55-53,780.81

Finding the Fourth Proportional to 87,770.43, 121,127.55 and 53,780.81

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Solution

The fourth proportional to 87,770.43, 121,127.55 and 53,780.81 is: 74,220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,770.43 : 121,127.55 = 53,780.81 : x
  2. Step 2: Convert to fraction form
    87,770.43/121,127.55 = 53,780.81/x
  3. Step 3: Cross multiply
    87,770.43x = 121,127.55 × 53,780.81
  4. Step 4: Simplify right side
    87,770.43x = 6,514,337,146.68
  5. Step 5: Solve for x
    x = 6,514,337,146.68/87,770.43
  6. Step 6: Final answer
    x = 74,220.18

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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.