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Finding the Fourth Proportional to 142,695.60, 214,043.40 and 72,711.60

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Solution

The fourth proportional to 142,695.60, 214,043.40 and 72,711.60 is: 109,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,695.60 : 214,043.40 = 72,711.60 : x
  2. Step 2: Convert to fraction form
    142,695.60/214,043.40 = 72,711.60/x
  3. Step 3: Cross multiply
    142,695.60x = 214,043.40 × 72,711.60
  4. Step 4: Simplify right side
    142,695.60x = 15,563,438,083.44
  5. Step 5: Solve for x
    x = 15,563,438,083.44/142,695.60
  6. Step 6: Final answer
    x = 109,067.40

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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.