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Finding the Fourth Proportional to 78,463.45, 117,695.18 and 25,866.10

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Solution

The fourth proportional to 78,463.45, 117,695.18 and 25,866.10 is: 38,799.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,463.45 : 117,695.18 = 25,866.10 : x
  2. Step 2: Convert to fraction form
    78,463.45/117,695.18 = 25,866.10/x
  3. Step 3: Cross multiply
    78,463.45x = 117,695.18 × 25,866.10
  4. Step 4: Simplify right side
    78,463.45x = 3,044,315,166.07
  5. Step 5: Solve for x
    x = 3,044,315,166.07/78,463.45
  6. Step 6: Final answer
    x = 38,799.15

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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.