Home / 87,781.04-121,138.25-49,542.20

Finding the Fourth Proportional to 87,781.04, 121,138.25 and 49,542.20

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Solution

The fourth proportional to 87,781.04, 121,138.25 and 49,542.20 is: 68,368.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,781.04 : 121,138.25 = 49,542.20 : x
  2. Step 2: Convert to fraction form
    87,781.04/121,138.25 = 49,542.20/x
  3. Step 3: Cross multiply
    87,781.04x = 121,138.25 × 49,542.20
  4. Step 4: Simplify right side
    87,781.04x = 6,001,455,457.08
  5. Step 5: Solve for x
    x = 6,001,455,457.08/87,781.04
  6. Step 6: Final answer
    x = 68,368.47

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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.