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Finding the Fourth Proportional to 89,771.40, 123,885.40 and 49,486.76

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Solution

The fourth proportional to 89,771.40, 123,885.40 and 49,486.76 is: 68,292.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,771.40 : 123,885.40 = 49,486.76 : x
  2. Step 2: Convert to fraction form
    89,771.40/123,885.40 = 49,486.76/x
  3. Step 3: Cross multiply
    89,771.40x = 123,885.40 × 49,486.76
  4. Step 4: Simplify right side
    89,771.40x = 6,130,687,057.30
  5. Step 5: Solve for x
    x = 6,130,687,057.30/89,771.40
  6. Step 6: Final answer
    x = 68,292.21

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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.