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Finding the Fourth Proportional to 66,062.80, 99,209.40 and 63,989.20

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Solution

The fourth proportional to 66,062.80, 99,209.40 and 63,989.20 is: 96,095.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,062.80 : 99,209.40 = 63,989.20 : x
  2. Step 2: Convert to fraction form
    66,062.80/99,209.40 = 63,989.20/x
  3. Step 3: Cross multiply
    66,062.80x = 99,209.40 × 63,989.20
  4. Step 4: Simplify right side
    66,062.80x = 6,348,330,138.48
  5. Step 5: Solve for x
    x = 6,348,330,138.48/66,062.80
  6. Step 6: Final answer
    x = 96,095.38

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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.