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Finding the Fourth Proportional to 99,863,428.80, 149,543,200.80 and 79,708,036.80

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Solution

The fourth proportional to 99,863,428.80, 149,543,200.80 and 79,708,036.80 is: 119,360,962.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,863,428.80 : 149,543,200.80 = 79,708,036.80 : x
  2. Step 2: Convert to fraction form
    99,863,428.80/149,543,200.80 = 79,708,036.80/x
  3. Step 3: Cross multiply
    99,863,428.80x = 149,543,200.80 × 79,708,036.80
  4. Step 4: Simplify right side
    99,863,428.80x = 11,919,794,952,556,190
  5. Step 5: Solve for x
    x = 11,919,794,952,556,190/99,863,428.80
  6. Step 6: Final answer
    x = 119,360,962.22

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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.