Home / 138,431.91-191,036.15-74,769.76

Finding the Fourth Proportional to 138,431.91, 191,036.15 and 74,769.76

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Solution

The fourth proportional to 138,431.91, 191,036.15 and 74,769.76 is: 103,182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,431.91 : 191,036.15 = 74,769.76 : x
  2. Step 2: Convert to fraction form
    138,431.91/191,036.15 = 74,769.76/x
  3. Step 3: Cross multiply
    138,431.91x = 191,036.15 × 74,769.76
  4. Step 4: Simplify right side
    138,431.91x = 14,283,727,086.82
  5. Step 5: Solve for x
    x = 14,283,727,086.82/138,431.91
  6. Step 6: Final answer
    x = 103,182.33

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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.