Home / 138,411.87-191,008.38-74,749.68

Finding the Fourth Proportional to 138,411.87, 191,008.38 and 74,749.68

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Solution

The fourth proportional to 138,411.87, 191,008.38 and 74,749.68 is: 103,154.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,411.87 : 191,008.38 = 74,749.68 : x
  2. Step 2: Convert to fraction form
    138,411.87/191,008.38 = 74,749.68/x
  3. Step 3: Cross multiply
    138,411.87x = 191,008.38 × 74,749.68
  4. Step 4: Simplify right side
    138,411.87x = 14,277,815,282.32
  5. Step 5: Solve for x
    x = 14,277,815,282.32/138,411.87
  6. Step 6: Final answer
    x = 103,154.56

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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.