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Finding the Fourth Proportional to 157,004,879.80, 216,666,744.02 and 87,388,766.12

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Solution

The fourth proportional to 157,004,879.80, 216,666,744.02 and 87,388,766.12 is: 120,596,502.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,004,879.80 : 216,666,744.02 = 87,388,766.12 : x
  2. Step 2: Convert to fraction form
    157,004,879.80/216,666,744.02 = 87,388,766.12/x
  3. Step 3: Cross multiply
    157,004,879.80x = 216,666,744.02 × 87,388,766.12
  4. Step 4: Simplify right side
    157,004,879.80x = 18,934,239,419,145,692
  5. Step 5: Solve for x
    x = 18,934,239,419,145,692/157,004,879.80
  6. Step 6: Final answer
    x = 120,596,502.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.