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Finding the Fourth Proportional to 66,289,971.20, 99,266,995.20 and 52,853,043.20

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Solution

The fourth proportional to 66,289,971.20, 99,266,995.20 and 52,853,043.20 is: 79,145,648.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,289,971.20 : 99,266,995.20 = 52,853,043.20 : x
  2. Step 2: Convert to fraction form
    66,289,971.20/99,266,995.20 = 52,853,043.20/x
  3. Step 3: Cross multiply
    66,289,971.20x = 99,266,995.20 × 52,853,043.20
  4. Step 4: Simplify right side
    66,289,971.20x = 5,246,562,785,639,793
  5. Step 5: Solve for x
    x = 5,246,562,785,639,793/66,289,971.20
  6. Step 6: Final answer
    x = 79,145,648.89

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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.