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Finding the Fourth Proportional to 92,490.32, 138,729.78 and 56,958.41

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Solution

The fourth proportional to 92,490.32, 138,729.78 and 56,958.41 is: 85,434.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,490.32 : 138,729.78 = 56,958.41 : x
  2. Step 2: Convert to fraction form
    92,490.32/138,729.78 = 56,958.41/x
  3. Step 3: Cross multiply
    92,490.32x = 138,729.78 × 56,958.41
  4. Step 4: Simplify right side
    92,490.32x = 7,901,826,994.80
  5. Step 5: Solve for x
    x = 7,901,826,994.80/92,490.32
  6. Step 6: Final answer
    x = 85,434.10

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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.