Home / 128,172.17-192,280.13-39,423.71

Finding the Fourth Proportional to 128,172.17, 192,280.13 and 39,423.71

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Solution

The fourth proportional to 128,172.17, 192,280.13 and 39,423.71 is: 59,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,172.17 : 192,280.13 = 39,423.71 : x
  2. Step 2: Convert to fraction form
    128,172.17/192,280.13 = 39,423.71/x
  3. Step 3: Cross multiply
    128,172.17x = 192,280.13 × 39,423.71
  4. Step 4: Simplify right side
    128,172.17x = 7,580,396,515.30
  5. Step 5: Solve for x
    x = 7,580,396,515.30/128,172.17
  6. Step 6: Final answer
    x = 59,142.30

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1.5x scale

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.