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Finding the Fourth Proportional to 72,695.60, 109,043.04 and 19,387.46

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Solution

The fourth proportional to 72,695.60, 109,043.04 and 19,387.46 is: 29,081.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.60 : 109,043.04 = 19,387.46 : x
  2. Step 2: Convert to fraction form
    72,695.60/109,043.04 = 19,387.46/x
  3. Step 3: Cross multiply
    72,695.60x = 109,043.04 × 19,387.46
  4. Step 4: Simplify right side
    72,695.60x = 2,114,067,576.28
  5. Step 5: Solve for x
    x = 2,114,067,576.28/72,695.60
  6. Step 6: Final answer
    x = 29,081.09

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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.