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Finding the Fourth Proportional to 90,428, 124,792.14 and 50,143.46

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Solution

The fourth proportional to 90,428, 124,792.14 and 50,143.46 is: 69,198.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428 : 124,792.14 = 50,143.46 : x
  2. Step 2: Convert to fraction form
    90,428/124,792.14 = 50,143.46/x
  3. Step 3: Cross multiply
    90,428x = 124,792.14 × 50,143.46
  4. Step 4: Simplify right side
    90,428x = 6,257,509,680.40
  5. Step 5: Solve for x
    x = 6,257,509,680.40/90,428
  6. Step 6: Final answer
    x = 69,198.81

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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.