Home / 100,569.47-138,760.97-56,962.71

Finding the Fourth Proportional to 100,569.47, 138,760.97 and 56,962.71

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Solution

The fourth proportional to 100,569.47, 138,760.97 and 56,962.71 is: 78,594.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,569.47 : 138,760.97 = 56,962.71 : x
  2. Step 2: Convert to fraction form
    100,569.47/138,760.97 = 56,962.71/x
  3. Step 3: Cross multiply
    100,569.47x = 138,760.97 × 56,962.71
  4. Step 4: Simplify right side
    100,569.47x = 7,904,200,608.62
  5. Step 5: Solve for x
    x = 7,904,200,608.62/100,569.47
  6. Step 6: Final answer
    x = 78,594.44

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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.