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Finding the Fourth Proportional to 98,832.72, 136,387.80 and 54,120.72

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Solution

The fourth proportional to 98,832.72, 136,387.80 and 54,120.72 is: 74,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,832.72 : 136,387.80 = 54,120.72 : x
  2. Step 2: Convert to fraction form
    98,832.72/136,387.80 = 54,120.72/x
  3. Step 3: Cross multiply
    98,832.72x = 136,387.80 × 54,120.72
  4. Step 4: Simplify right side
    98,832.72x = 7,381,405,935.22
  5. Step 5: Solve for x
    x = 7,381,405,935.22/98,832.72
  6. Step 6: Final answer
    x = 74,685.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.