Home / 115,414.47-159,274.65-72,395.78

Finding the Fourth Proportional to 115,414.47, 159,274.65 and 72,395.78

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Solution

The fourth proportional to 115,414.47, 159,274.65 and 72,395.78 is: 99,907.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,414.47 : 159,274.65 = 72,395.78 : x
  2. Step 2: Convert to fraction form
    115,414.47/159,274.65 = 72,395.78/x
  3. Step 3: Cross multiply
    115,414.47x = 159,274.65 × 72,395.78
  4. Step 4: Simplify right side
    115,414.47x = 11,530,812,520.98
  5. Step 5: Solve for x
    x = 11,530,812,520.98/115,414.47
  6. Step 6: Final answer
    x = 99,907.86

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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.