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Finding the Fourth Proportional to 78,473.65, 117,537.68 and 69,718.45

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Solution

The fourth proportional to 78,473.65, 117,537.68 and 69,718.45 is: 104,424.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,473.65 : 117,537.68 = 69,718.45 : x
  2. Step 2: Convert to fraction form
    78,473.65/117,537.68 = 69,718.45/x
  3. Step 3: Cross multiply
    78,473.65x = 117,537.68 × 69,718.45
  4. Step 4: Simplify right side
    78,473.65x = 8,194,544,517.60
  5. Step 5: Solve for x
    x = 8,194,544,517.60/78,473.65
  6. Step 6: Final answer
    x = 104,424.15

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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.