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Finding the Fourth Proportional to 65,769,423.80, 98,654,135.70 and 20,331,145.40

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Solution

The fourth proportional to 65,769,423.80, 98,654,135.70 and 20,331,145.40 is: 30,496,718.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,769,423.80 : 98,654,135.70 = 20,331,145.40 : x
  2. Step 2: Convert to fraction form
    65,769,423.80/98,654,135.70 = 20,331,145.40/x
  3. Step 3: Cross multiply
    65,769,423.80x = 98,654,135.70 × 20,331,145.40
  4. Step 4: Simplify right side
    65,769,423.80x = 2,005,751,577,228,030.75
  5. Step 5: Solve for x
    x = 2,005,751,577,228,030.75/65,769,423.80
  6. Step 6: Final answer
    x = 30,496,718.10

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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.