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Finding the Fourth Proportional to 109,447.70, 151,031.32 and 63,503.79

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Solution

The fourth proportional to 109,447.70, 151,031.32 and 63,503.79 is: 87,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,447.70 : 151,031.32 = 63,503.79 : x
  2. Step 2: Convert to fraction form
    109,447.70/151,031.32 = 63,503.79/x
  3. Step 3: Cross multiply
    109,447.70x = 151,031.32 × 63,503.79
  4. Step 4: Simplify right side
    109,447.70x = 9,591,061,228.70
  5. Step 5: Solve for x
    x = 9,591,061,228.70/109,447.70
  6. Step 6: Final answer
    x = 87,631.46

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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.