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Finding the Fourth Proportional to 98,909.96, 148,389.26 and 28,789.88

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Solution

The fourth proportional to 98,909.96, 148,389.26 and 28,789.88 is: 43,191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,909.96 : 148,389.26 = 28,789.88 : x
  2. Step 2: Convert to fraction form
    98,909.96/148,389.26 = 28,789.88/x
  3. Step 3: Cross multiply
    98,909.96x = 148,389.26 × 28,789.88
  4. Step 4: Simplify right side
    98,909.96x = 4,272,108,988.69
  5. Step 5: Solve for x
    x = 4,272,108,988.69/98,909.96
  6. Step 6: Final answer
    x = 43,191.90

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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.