Home / 138,798.60-191,543.04-75,136.92

Finding the Fourth Proportional to 138,798.60, 191,543.04 and 75,136.92

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Solution

The fourth proportional to 138,798.60, 191,543.04 and 75,136.92 is: 103,689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,798.60 : 191,543.04 = 75,136.92 : x
  2. Step 2: Convert to fraction form
    138,798.60/191,543.04 = 75,136.92/x
  3. Step 3: Cross multiply
    138,798.60x = 191,543.04 × 75,136.92
  4. Step 4: Simplify right side
    138,798.60x = 14,391,954,073.04
  5. Step 5: Solve for x
    x = 14,391,954,073.04/138,798.60
  6. Step 6: Final answer
    x = 103,689.48

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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.