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Finding the Fourth Proportional to 66,978.01, 100,484.52 and 38,871.04

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Solution

The fourth proportional to 66,978.01, 100,484.52 and 38,871.04 is: 58,316.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,978.01 : 100,484.52 = 38,871.04 : x
  2. Step 2: Convert to fraction form
    66,978.01/100,484.52 = 38,871.04/x
  3. Step 3: Cross multiply
    66,978.01x = 100,484.52 × 38,871.04
  4. Step 4: Simplify right side
    66,978.01x = 3,905,937,796.30
  5. Step 5: Solve for x
    x = 3,905,937,796.30/66,978.01
  6. Step 6: Final answer
    x = 58,316.72

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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.