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Finding the Fourth Proportional to 123,670,412.80, 185,505,619.20 and 42,891,380.80

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Solution

The fourth proportional to 123,670,412.80, 185,505,619.20 and 42,891,380.80 is: 64,337,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670,412.80 : 185,505,619.20 = 42,891,380.80 : x
  2. Step 2: Convert to fraction form
    123,670,412.80/185,505,619.20 = 42,891,380.80/x
  3. Step 3: Cross multiply
    123,670,412.80x = 185,505,619.20 × 42,891,380.80
  4. Step 4: Simplify right side
    123,670,412.80x = 7,956,592,153,646,990
  5. Step 5: Solve for x
    x = 7,956,592,153,646,990/123,670,412.80
  6. Step 6: Final answer
    x = 64,337,071.20

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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.