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Finding the Fourth Proportional to 92,387.40, 138,548.70 and 47,999.40

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Solution

The fourth proportional to 92,387.40, 138,548.70 and 47,999.40 is: 71,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,387.40 : 138,548.70 = 47,999.40 : x
  2. Step 2: Convert to fraction form
    92,387.40/138,548.70 = 47,999.40/x
  3. Step 3: Cross multiply
    92,387.40x = 138,548.70 × 47,999.40
  4. Step 4: Simplify right side
    92,387.40x = 6,650,254,470.78
  5. Step 5: Solve for x
    x = 6,650,254,470.78/92,387.40
  6. Step 6: Final answer
    x = 71,982.27

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1.5x scale

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.