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Finding the Fourth Proportional to 112,779.90, 155,652.84 and 65,023.92

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Solution

The fourth proportional to 112,779.90, 155,652.84 and 65,023.92 is: 89,742.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,779.90 : 155,652.84 = 65,023.92 : x
  2. Step 2: Convert to fraction form
    112,779.90/155,652.84 = 65,023.92/x
  3. Step 3: Cross multiply
    112,779.90x = 155,652.84 × 65,023.92
  4. Step 4: Simplify right side
    112,779.90x = 10,121,157,815.93
  5. Step 5: Solve for x
    x = 10,121,157,815.93/112,779.90
  6. Step 6: Final answer
    x = 89,742.57

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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.