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Finding the Fourth Proportional to 124,579.80, 186,432.30 and 85,213.80

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Solution

The fourth proportional to 124,579.80, 186,432.30 and 85,213.80 is: 127,521.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,579.80 : 186,432.30 = 85,213.80 : x
  2. Step 2: Convert to fraction form
    124,579.80/186,432.30 = 85,213.80/x
  3. Step 3: Cross multiply
    124,579.80x = 186,432.30 × 85,213.80
  4. Step 4: Simplify right side
    124,579.80x = 15,886,604,725.74
  5. Step 5: Solve for x
    x = 15,886,604,725.74/124,579.80
  6. Step 6: Final answer
    x = 127,521.51

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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.