Home / 105,916.32-158,839.20-42,720.12

Finding the Fourth Proportional to 105,916.32, 158,839.20 and 42,720.12

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Solution

The fourth proportional to 105,916.32, 158,839.20 and 42,720.12 is: 64,065.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,916.32 : 158,839.20 = 42,720.12 : x
  2. Step 2: Convert to fraction form
    105,916.32/158,839.20 = 42,720.12/x
  3. Step 3: Cross multiply
    105,916.32x = 158,839.20 × 42,720.12
  4. Step 4: Simplify right side
    105,916.32x = 6,785,629,684.70
  5. Step 5: Solve for x
    x = 6,785,629,684.70/105,916.32
  6. Step 6: Final answer
    x = 64,065.95

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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.