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Finding the Fourth Proportional to 85,298.88, 127,948.16 and 45,874.56

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Solution

The fourth proportional to 85,298.88, 127,948.16 and 45,874.56 is: 68,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,298.88 : 127,948.16 = 45,874.56 : x
  2. Step 2: Convert to fraction form
    85,298.88/127,948.16 = 45,874.56/x
  3. Step 3: Cross multiply
    85,298.88x = 127,948.16 × 45,874.56
  4. Step 4: Simplify right side
    85,298.88x = 5,869,565,542.81
  5. Step 5: Solve for x
    x = 5,869,565,542.81/85,298.88
  6. Step 6: Final answer
    x = 68,811.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.