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Finding the Fourth Proportional to 99,115.78, 136,779.84 and 53,793.74

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Solution

The fourth proportional to 99,115.78, 136,779.84 and 53,793.74 is: 74,235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,115.78 : 136,779.84 = 53,793.74 : x
  2. Step 2: Convert to fraction form
    99,115.78/136,779.84 = 53,793.74/x
  3. Step 3: Cross multiply
    99,115.78x = 136,779.84 × 53,793.74
  4. Step 4: Simplify right side
    99,115.78x = 7,357,899,150.20
  5. Step 5: Solve for x
    x = 7,357,899,150.20/99,115.78
  6. Step 6: Final answer
    x = 74,235.40

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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.