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Finding the Fourth Proportional to 66,442.70, 99,664.05 and 63,818.30

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Solution

The fourth proportional to 66,442.70, 99,664.05 and 63,818.30 is: 95,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,442.70 : 99,664.05 = 63,818.30 : x
  2. Step 2: Convert to fraction form
    66,442.70/99,664.05 = 63,818.30/x
  3. Step 3: Cross multiply
    66,442.70x = 99,664.05 × 63,818.30
  4. Step 4: Simplify right side
    66,442.70x = 6,360,390,242.12
  5. Step 5: Solve for x
    x = 6,360,390,242.12/66,442.70
  6. Step 6: Final answer
    x = 95,727.45

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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.