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Finding the Fourth Proportional to 70,156.66, 105,397.80 and 66,380.44

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Solution

The fourth proportional to 70,156.66, 105,397.80 and 66,380.44 is: 99,724.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,156.66 : 105,397.80 = 66,380.44 : x
  2. Step 2: Convert to fraction form
    70,156.66/105,397.80 = 66,380.44/x
  3. Step 3: Cross multiply
    70,156.66x = 105,397.80 × 66,380.44
  4. Step 4: Simplify right side
    70,156.66x = 6,996,352,339.03
  5. Step 5: Solve for x
    x = 6,996,352,339.03/70,156.66
  6. Step 6: Final answer
    x = 99,724.71

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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.