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Finding the Fourth Proportional to 99,031.52, 148,531.36 and 28,894.40

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Solution

The fourth proportional to 99,031.52, 148,531.36 and 28,894.40 is: 43,336.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,031.52 : 148,531.36 = 28,894.40 : x
  2. Step 2: Convert to fraction form
    99,031.52/148,531.36 = 28,894.40/x
  3. Step 3: Cross multiply
    99,031.52x = 148,531.36 × 28,894.40
  4. Step 4: Simplify right side
    99,031.52x = 4,291,724,528.38
  5. Step 5: Solve for x
    x = 4,291,724,528.38/99,031.52
  6. Step 6: Final answer
    x = 43,336.96

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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.