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Finding the Fourth Proportional to 70,691.60, 106,037.40 and 68,643.60

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Solution

The fourth proportional to 70,691.60, 106,037.40 and 68,643.60 is: 102,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,691.60 : 106,037.40 = 68,643.60 : x
  2. Step 2: Convert to fraction form
    70,691.60/106,037.40 = 68,643.60/x
  3. Step 3: Cross multiply
    70,691.60x = 106,037.40 × 68,643.60
  4. Step 4: Simplify right side
    70,691.60x = 7,278,788,870.64
  5. Step 5: Solve for x
    x = 7,278,788,870.64/70,691.60
  6. Step 6: Final answer
    x = 102,965.40

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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.