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Finding the Fourth Proportional to 92,990.40, 128,325.24 and 50,550

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Solution

The fourth proportional to 92,990.40, 128,325.24 and 50,550 is: 69,758.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,990.40 : 128,325.24 = 50,550 : x
  2. Step 2: Convert to fraction form
    92,990.40/128,325.24 = 50,550/x
  3. Step 3: Cross multiply
    92,990.40x = 128,325.24 × 50,550
  4. Step 4: Simplify right side
    92,990.40x = 6,486,840,882
  5. Step 5: Solve for x
    x = 6,486,840,882/92,990.40
  6. Step 6: Final answer
    x = 69,758.18

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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.