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Finding the Fourth Proportional to 98,856, 136,421.28 and 54,144.96

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Solution

The fourth proportional to 98,856, 136,421.28 and 54,144.96 is: 74,720.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,856 : 136,421.28 = 54,144.96 : x
  2. Step 2: Convert to fraction form
    98,856/136,421.28 = 54,144.96/x
  3. Step 3: Cross multiply
    98,856x = 136,421.28 × 54,144.96
  4. Step 4: Simplify right side
    98,856x = 7,386,524,748.75
  5. Step 5: Solve for x
    x = 7,386,524,748.75/98,856
  6. Step 6: Final answer
    x = 74,720.04

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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.