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Finding the Fourth Proportional to 67,380.60, 101,070.90 and 47,681.40

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Solution

The fourth proportional to 67,380.60, 101,070.90 and 47,681.40 is: 71,522.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,380.60 : 101,070.90 = 47,681.40 : x
  2. Step 2: Convert to fraction form
    67,380.60/101,070.90 = 47,681.40/x
  3. Step 3: Cross multiply
    67,380.60x = 101,070.90 × 47,681.40
  4. Step 4: Simplify right side
    67,380.60x = 4,819,202,011.26
  5. Step 5: Solve for x
    x = 4,819,202,011.26/67,380.60
  6. Step 6: Final answer
    x = 71,522.10

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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.