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Finding the Fourth Proportional to 91,256.80, 136,910.80 and 44,511.20

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Solution

The fourth proportional to 91,256.80, 136,910.80 and 44,511.20 is: 66,779.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,256.80 : 136,910.80 = 44,511.20 : x
  2. Step 2: Convert to fraction form
    91,256.80/136,910.80 = 44,511.20/x
  3. Step 3: Cross multiply
    91,256.80x = 136,910.80 × 44,511.20
  4. Step 4: Simplify right side
    91,256.80x = 6,094,064,000.96
  5. Step 5: Solve for x
    x = 6,094,064,000.96/91,256.80
  6. Step 6: Final answer
    x = 66,779.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.