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Finding the Fourth Proportional to 72,325.60, 108,472.20 and 47,539.60

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Solution

The fourth proportional to 72,325.60, 108,472.20 and 47,539.60 is: 71,298.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,325.60 : 108,472.20 = 47,539.60 : x
  2. Step 2: Convert to fraction form
    72,325.60/108,472.20 = 47,539.60/x
  3. Step 3: Cross multiply
    72,325.60x = 108,472.20 × 47,539.60
  4. Step 4: Simplify right side
    72,325.60x = 5,156,724,999.12
  5. Step 5: Solve for x
    x = 5,156,724,999.12/72,325.60
  6. Step 6: Final answer
    x = 71,298.75

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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.