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Finding the Fourth Proportional to 99,100.44, 148,663.89 and 28,978.74

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Solution

The fourth proportional to 99,100.44, 148,663.89 and 28,978.74 is: 43,471.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,100.44 : 148,663.89 = 28,978.74 : x
  2. Step 2: Convert to fraction form
    99,100.44/148,663.89 = 28,978.74/x
  3. Step 3: Cross multiply
    99,100.44x = 148,663.89 × 28,978.74
  4. Step 4: Simplify right side
    99,100.44x = 4,308,092,215.70
  5. Step 5: Solve for x
    x = 4,308,092,215.70/99,100.44
  6. Step 6: Final answer
    x = 43,471.98

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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.