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Finding the Fourth Proportional to 389,443.08, 584,169.30 and 136,729.92

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Solution

The fourth proportional to 389,443.08, 584,169.30 and 136,729.92 is: 205,096.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,443.08 : 584,169.30 = 136,729.92 : x
  2. Step 2: Convert to fraction form
    389,443.08/584,169.30 = 136,729.92/x
  3. Step 3: Cross multiply
    389,443.08x = 584,169.30 × 136,729.92
  4. Step 4: Simplify right side
    389,443.08x = 79,873,421,655.46
  5. Step 5: Solve for x
    x = 79,873,421,655.46/389,443.08
  6. Step 6: Final answer
    x = 205,096.52

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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.