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Finding the Fourth Proportional to 115,515.28, 159,411.84 and 67,769.68

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Solution

The fourth proportional to 115,515.28, 159,411.84 and 67,769.68 is: 93,522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,515.28 : 159,411.84 = 67,769.68 : x
  2. Step 2: Convert to fraction form
    115,515.28/159,411.84 = 67,769.68/x
  3. Step 3: Cross multiply
    115,515.28x = 159,411.84 × 67,769.68
  4. Step 4: Simplify right side
    115,515.28x = 10,803,289,385.01
  5. Step 5: Solve for x
    x = 10,803,289,385.01/115,515.28
  6. Step 6: Final answer
    x = 93,522.60

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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.