Home / 90,428.40-124,792.11-50,142.78

Finding the Fourth Proportional to 90,428.40, 124,792.11 and 50,142.78

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Solution

The fourth proportional to 90,428.40, 124,792.11 and 50,142.78 is: 69,197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428.40 : 124,792.11 = 50,142.78 : x
  2. Step 2: Convert to fraction form
    90,428.40/124,792.11 = 50,142.78/x
  3. Step 3: Cross multiply
    90,428.40x = 124,792.11 × 50,142.78
  4. Step 4: Simplify right side
    90,428.40x = 6,257,423,317.47
  5. Step 5: Solve for x
    x = 6,257,423,317.47/90,428.40
  6. Step 6: Final answer
    x = 69,197.55

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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.