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Finding the Fourth Proportional to 90,405.71, 124,754.95 and 50,117.12

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Solution

The fourth proportional to 90,405.71, 124,754.95 and 50,117.12 is: 69,158.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,405.71 : 124,754.95 = 50,117.12 : x
  2. Step 2: Convert to fraction form
    90,405.71/124,754.95 = 50,117.12/x
  3. Step 3: Cross multiply
    90,405.71x = 124,754.95 × 50,117.12
  4. Step 4: Simplify right side
    90,405.71x = 6,252,358,799.74
  5. Step 5: Solve for x
    x = 6,252,358,799.74/90,405.71
  6. Step 6: Final answer
    x = 69,158.89

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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.