Home / 138,607.71-191,278.95-74,945.76

Finding the Fourth Proportional to 138,607.71, 191,278.95 and 74,945.76

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Solution

The fourth proportional to 138,607.71, 191,278.95 and 74,945.76 is: 103,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.71 : 191,278.95 = 74,945.76 : x
  2. Step 2: Convert to fraction form
    138,607.71/191,278.95 = 74,945.76/x
  3. Step 3: Cross multiply
    138,607.71x = 191,278.95 × 74,945.76
  4. Step 4: Simplify right side
    138,607.71x = 14,335,546,279.75
  5. Step 5: Solve for x
    x = 14,335,546,279.75/138,607.71
  6. Step 6: Final answer
    x = 103,425.32

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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.