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Finding the Fourth Proportional to 92,486.56, 138,728.88 and 48,090.40

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Solution

The fourth proportional to 92,486.56, 138,728.88 and 48,090.40 is: 72,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,486.56 : 138,728.88 = 48,090.40 : x
  2. Step 2: Convert to fraction form
    92,486.56/138,728.88 = 48,090.40/x
  3. Step 3: Cross multiply
    92,486.56x = 138,728.88 × 48,090.40
  4. Step 4: Simplify right side
    92,486.56x = 6,671,527,330.75
  5. Step 5: Solve for x
    x = 6,671,527,330.75/92,486.56
  6. Step 6: Final answer
    x = 72,135.10

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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.