Home / 99,139.17-148,708.85-81,572.07

Finding the Fourth Proportional to 99,139.17, 148,708.85 and 81,572.07

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Solution

The fourth proportional to 99,139.17, 148,708.85 and 81,572.07 is: 122,358.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,139.17 : 148,708.85 = 81,572.07 : x
  2. Step 2: Convert to fraction form
    99,139.17/148,708.85 = 81,572.07/x
  3. Step 3: Cross multiply
    99,139.17x = 148,708.85 × 81,572.07
  4. Step 4: Simplify right side
    99,139.17x = 12,130,488,721.82
  5. Step 5: Solve for x
    x = 12,130,488,721.82/99,139.17
  6. Step 6: Final answer
    x = 122,358.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.