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Finding the Fourth Proportional to 106,468.80, 159,703.20 and 87,806.40

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Solution

The fourth proportional to 106,468.80, 159,703.20 and 87,806.40 is: 131,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,468.80 : 159,703.20 = 87,806.40 : x
  2. Step 2: Convert to fraction form
    106,468.80/159,703.20 = 87,806.40/x
  3. Step 3: Cross multiply
    106,468.80x = 159,703.20 × 87,806.40
  4. Step 4: Simplify right side
    106,468.80x = 14,022,963,060.48
  5. Step 5: Solve for x
    x = 14,022,963,060.48/106,468.80
  6. Step 6: Final answer
    x = 131,709.60

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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.