Home / 138,778.68-191,515.98-75,117.84

Finding the Fourth Proportional to 138,778.68, 191,515.98 and 75,117.84

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Solution

The fourth proportional to 138,778.68, 191,515.98 and 75,117.84 is: 103,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,778.68 : 191,515.98 = 75,117.84 : x
  2. Step 2: Convert to fraction form
    138,778.68/191,515.98 = 75,117.84/x
  3. Step 3: Cross multiply
    138,778.68x = 191,515.98 × 75,117.84
  4. Step 4: Simplify right side
    138,778.68x = 14,386,266,743.08
  5. Step 5: Solve for x
    x = 14,386,266,743.08/138,778.68
  6. Step 6: Final answer
    x = 103,663.38

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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.