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Finding the Fourth Proportional to 72,764,697.40, 108,987,613.80 and 64,686,794.20

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Solution

The fourth proportional to 72,764,697.40, 108,987,613.80 and 64,686,794.20 is: 96,888,458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,764,697.40 : 108,987,613.80 = 64,686,794.20 : x
  2. Step 2: Convert to fraction form
    72,764,697.40/108,987,613.80 = 64,686,794.20/x
  3. Step 3: Cross multiply
    72,764,697.40x = 108,987,613.80 × 64,686,794.20
  4. Step 4: Simplify right side
    72,764,697.40x = 7,050,059,344,229,680
  5. Step 5: Solve for x
    x = 7,050,059,344,229,680/72,764,697.40
  6. Step 6: Final answer
    x = 96,888,458.22

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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.