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Finding the Fourth Proportional to 72,581,763.60, 108,872,645.40 and 45,707,907.60

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Solution

The fourth proportional to 72,581,763.60, 108,872,645.40 and 45,707,907.60 is: 68,561,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,763.60 : 108,872,645.40 = 45,707,907.60 : x
  2. Step 2: Convert to fraction form
    72,581,763.60/108,872,645.40 = 45,707,907.60/x
  3. Step 3: Cross multiply
    72,581,763.60x = 108,872,645.40 × 45,707,907.60
  4. Step 4: Simplify right side
    72,581,763.60x = 4,976,340,816,110,765
  5. Step 5: Solve for x
    x = 4,976,340,816,110,765/72,581,763.60
  6. Step 6: Final answer
    x = 68,561,861.40

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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.