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Finding the Fourth Proportional to 90,103, 124,342.20 and 50,359

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Solution

The fourth proportional to 90,103, 124,342.20 and 50,359 is: 69,495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,103 : 124,342.20 = 50,359 : x
  2. Step 2: Convert to fraction form
    90,103/124,342.20 = 50,359/x
  3. Step 3: Cross multiply
    90,103x = 124,342.20 × 50,359
  4. Step 4: Simplify right side
    90,103x = 6,261,748,849.80
  5. Step 5: Solve for x
    x = 6,261,748,849.80/90,103
  6. Step 6: Final answer
    x = 69,495.45

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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.