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Finding the Fourth Proportional to 99,446.40, 149,713.92 and 90,737.28

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Solution

The fourth proportional to 99,446.40, 149,713.92 and 90,737.28 is: 136,602.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,446.40 : 149,713.92 = 90,737.28 : x
  2. Step 2: Convert to fraction form
    99,446.40/149,713.92 = 90,737.28/x
  3. Step 3: Cross multiply
    99,446.40x = 149,713.92 × 90,737.28
  4. Step 4: Simplify right side
    99,446.40x = 13,584,633,878.94
  5. Step 5: Solve for x
    x = 13,584,633,878.94/99,446.40
  6. Step 6: Final answer
    x = 136,602.57

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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.