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Finding the Fourth Proportional to 324,769,681.80, 487,154,522.70 and 82,432,585.80

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Solution

The fourth proportional to 324,769,681.80, 487,154,522.70 and 82,432,585.80 is: 123,648,878.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,769,681.80 : 487,154,522.70 = 82,432,585.80 : x
  2. Step 2: Convert to fraction form
    324,769,681.80/487,154,522.70 = 82,432,585.80/x
  3. Step 3: Cross multiply
    324,769,681.80x = 487,154,522.70 × 82,432,585.80
  4. Step 4: Simplify right side
    324,769,681.80x = 40,157,406,990,325,792
  5. Step 5: Solve for x
    x = 40,157,406,990,325,792/324,769,681.80
  6. Step 6: Final answer
    x = 123,648,878.70

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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.