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Finding the Fourth Proportional to 66,557.80, 99,822.30 and 29,117.80

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Solution

The fourth proportional to 66,557.80, 99,822.30 and 29,117.80 is: 43,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,557.80 : 99,822.30 = 29,117.80 : x
  2. Step 2: Convert to fraction form
    66,557.80/99,822.30 = 29,117.80/x
  3. Step 3: Cross multiply
    66,557.80x = 99,822.30 × 29,117.80
  4. Step 4: Simplify right side
    66,557.80x = 2,906,605,766.94
  5. Step 5: Solve for x
    x = 2,906,605,766.94/66,557.80
  6. Step 6: Final answer
    x = 43,670.40

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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.