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Finding the Fourth Proportional to 72,177.80, 108,266.70 and 47,294.60

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Solution

The fourth proportional to 72,177.80, 108,266.70 and 47,294.60 is: 70,941.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,177.80 : 108,266.70 = 47,294.60 : x
  2. Step 2: Convert to fraction form
    72,177.80/108,266.70 = 47,294.60/x
  3. Step 3: Cross multiply
    72,177.80x = 108,266.70 × 47,294.60
  4. Step 4: Simplify right side
    72,177.80x = 5,120,430,269.82
  5. Step 5: Solve for x
    x = 5,120,430,269.82/72,177.80
  6. Step 6: Final answer
    x = 70,941.90

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1.5x scale

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.