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Finding the Fourth Proportional to 72,189.60, 108,140.40 and 63,530.40

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Solution

The fourth proportional to 72,189.60, 108,140.40 and 63,530.40 is: 95,168.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.60 : 108,140.40 = 63,530.40 : x
  2. Step 2: Convert to fraction form
    72,189.60/108,140.40 = 63,530.40/x
  3. Step 3: Cross multiply
    72,189.60x = 108,140.40 × 63,530.40
  4. Step 4: Simplify right side
    72,189.60x = 6,870,202,868.16
  5. Step 5: Solve for x
    x = 6,870,202,868.16/72,189.60
  6. Step 6: Final answer
    x = 95,168.87

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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.