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Finding the Fourth Proportional to 389,064,687, 583,596,310.92 and 126,748,924.80

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Solution

The fourth proportional to 389,064,687, 583,596,310.92 and 126,748,924.80 is: 190,123,152.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,064,687 : 583,596,310.92 = 126,748,924.80 : x
  2. Step 2: Convert to fraction form
    389,064,687/583,596,310.92 = 126,748,924.80/x
  3. Step 3: Cross multiply
    389,064,687x = 583,596,310.92 × 126,748,924.80
  4. Step 4: Simplify right side
    389,064,687x = 73,970,204,926,356,496
  5. Step 5: Solve for x
    x = 73,970,204,926,356,496/389,064,687
  6. Step 6: Final answer
    x = 190,123,152.78

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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.