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Finding the Fourth Proportional to 61,478.80, 92,218.20 and 54,261.70

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Solution

The fourth proportional to 61,478.80, 92,218.20 and 54,261.70 is: 81,392.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,478.80 : 92,218.20 = 54,261.70 : x
  2. Step 2: Convert to fraction form
    61,478.80/92,218.20 = 54,261.70/x
  3. Step 3: Cross multiply
    61,478.80x = 92,218.20 × 54,261.70
  4. Step 4: Simplify right side
    61,478.80x = 5,003,916,302.94
  5. Step 5: Solve for x
    x = 5,003,916,302.94/61,478.80
  6. Step 6: Final answer
    x = 81,392.55

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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.