Home / 99,470.40-149,750.14-90,761.28

Finding the Fourth Proportional to 99,470.40, 149,750.14 and 90,761.28

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Solution

The fourth proportional to 99,470.40, 149,750.14 and 90,761.28 is: 136,638.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,470.40 : 149,750.14 = 90,761.28 : x
  2. Step 2: Convert to fraction form
    99,470.40/149,750.14 = 90,761.28/x
  3. Step 3: Cross multiply
    99,470.40x = 149,750.14 × 90,761.28
  4. Step 4: Simplify right side
    99,470.40x = 13,591,514,386.58
  5. Step 5: Solve for x
    x = 13,591,514,386.58/99,470.40
  6. Step 6: Final answer
    x = 136,638.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.