Home / 85,962.90-128,949.27-22,781.39

Finding the Fourth Proportional to 85,962.90, 128,949.27 and 22,781.39

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Solution

The fourth proportional to 85,962.90, 128,949.27 and 22,781.39 is: 34,173.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962.90 : 128,949.27 = 22,781.39 : x
  2. Step 2: Convert to fraction form
    85,962.90/128,949.27 = 22,781.39/x
  3. Step 3: Cross multiply
    85,962.90x = 128,949.27 × 22,781.39
  4. Step 4: Simplify right side
    85,962.90x = 2,937,642,879.91
  5. Step 5: Solve for x
    x = 2,937,642,879.91/85,962.90
  6. Step 6: Final answer
    x = 34,173.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.