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Finding the Fourth Proportional to 104,272.80, 156,700.80 and 91,442.40

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Solution

The fourth proportional to 104,272.80, 156,700.80 and 91,442.40 is: 137,419.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,272.80 : 156,700.80 = 91,442.40 : x
  2. Step 2: Convert to fraction form
    104,272.80/156,700.80 = 91,442.40/x
  3. Step 3: Cross multiply
    104,272.80x = 156,700.80 × 91,442.40
  4. Step 4: Simplify right side
    104,272.80x = 14,329,097,233.92
  5. Step 5: Solve for x
    x = 14,329,097,233.92/104,272.80
  6. Step 6: Final answer
    x = 137,419.32

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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.