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Finding the Fourth Proportional to 98,877.72, 136,451.34 and 54,165.72

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Solution

The fourth proportional to 98,877.72, 136,451.34 and 54,165.72 is: 74,748.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,877.72 : 136,451.34 = 54,165.72 : x
  2. Step 2: Convert to fraction form
    98,877.72/136,451.34 = 54,165.72/x
  3. Step 3: Cross multiply
    98,877.72x = 136,451.34 × 54,165.72
  4. Step 4: Simplify right side
    98,877.72x = 7,390,985,076.06
  5. Step 5: Solve for x
    x = 7,390,985,076.06/98,877.72
  6. Step 6: Final answer
    x = 74,748.74

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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.