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Finding the Fourth Proportional to 185,637, 278,572.64 and 79,020.78

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Solution

The fourth proportional to 185,637, 278,572.64 and 79,020.78 is: 118,581.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,637 : 278,572.64 = 79,020.78 : x
  2. Step 2: Convert to fraction form
    185,637/278,572.64 = 79,020.78/x
  3. Step 3: Cross multiply
    185,637x = 278,572.64 × 79,020.78
  4. Step 4: Simplify right side
    185,637x = 22,013,027,299.46
  5. Step 5: Solve for x
    x = 22,013,027,299.46/185,637
  6. Step 6: Final answer
    x = 118,581.03

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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.