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Finding the Fourth Proportional to 72,289.50, 99,821.08 and 45,476.88

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Solution

The fourth proportional to 72,289.50, 99,821.08 and 45,476.88 is: 62,796.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,289.50 : 99,821.08 = 45,476.88 : x
  2. Step 2: Convert to fraction form
    72,289.50/99,821.08 = 45,476.88/x
  3. Step 3: Cross multiply
    72,289.50x = 99,821.08 × 45,476.88
  4. Step 4: Simplify right side
    72,289.50x = 4,539,551,276.63
  5. Step 5: Solve for x
    x = 4,539,551,276.63/72,289.50
  6. Step 6: Final answer
    x = 62,796.83

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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.