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Finding the Fourth Proportional to 78,338.53, 108,154.34 and 73,855.18

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Solution

The fourth proportional to 78,338.53, 108,154.34 and 73,855.18 is: 101,964.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.53 : 108,154.34 = 73,855.18 : x
  2. Step 2: Convert to fraction form
    78,338.53/108,154.34 = 73,855.18/x
  3. Step 3: Cross multiply
    78,338.53x = 108,154.34 × 73,855.18
  4. Step 4: Simplify right side
    78,338.53x = 7,987,758,248.48
  5. Step 5: Solve for x
    x = 7,987,758,248.48/78,338.53
  6. Step 6: Final answer
    x = 101,964.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.