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Finding the Fourth Proportional to 99,319.28, 148,913.16 and 39,308

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Solution

The fourth proportional to 99,319.28, 148,913.16 and 39,308 is: 58,935.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,319.28 : 148,913.16 = 39,308 : x
  2. Step 2: Convert to fraction form
    99,319.28/148,913.16 = 39,308/x
  3. Step 3: Cross multiply
    99,319.28x = 148,913.16 × 39,308
  4. Step 4: Simplify right side
    99,319.28x = 5,853,478,493.28
  5. Step 5: Solve for x
    x = 5,853,478,493.28/99,319.28
  6. Step 6: Final answer
    x = 58,935.97

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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.