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Finding the Fourth Proportional to 90,376, 124,718.64 and 50,089.84

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Solution

The fourth proportional to 90,376, 124,718.64 and 50,089.84 is: 69,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,376 : 124,718.64 = 50,089.84 : x
  2. Step 2: Convert to fraction form
    90,376/124,718.64 = 50,089.84/x
  3. Step 3: Cross multiply
    90,376x = 124,718.64 × 50,089.84
  4. Step 4: Simplify right side
    90,376x = 6,247,136,722.62
  5. Step 5: Solve for x
    x = 6,247,136,722.62/90,376
  6. Step 6: Final answer
    x = 69,123.85

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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.