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Finding the Fourth Proportional to 106,468.80, 159,703.20 and 78,475.20

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Solution

The fourth proportional to 106,468.80, 159,703.20 and 78,475.20 is: 117,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,468.80 : 159,703.20 = 78,475.20 : x
  2. Step 2: Convert to fraction form
    106,468.80/159,703.20 = 78,475.20/x
  3. Step 3: Cross multiply
    106,468.80x = 159,703.20 × 78,475.20
  4. Step 4: Simplify right side
    106,468.80x = 12,532,740,560.64
  5. Step 5: Solve for x
    x = 12,532,740,560.64/106,468.80
  6. Step 6: Final answer
    x = 117,712.80

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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.