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Finding the Fourth Proportional to 85,515.92, 128,276.76 and 23,187.92

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Solution

The fourth proportional to 85,515.92, 128,276.76 and 23,187.92 is: 34,782.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.92 : 128,276.76 = 23,187.92 : x
  2. Step 2: Convert to fraction form
    85,515.92/128,276.76 = 23,187.92/x
  3. Step 3: Cross multiply
    85,515.92x = 128,276.76 × 23,187.92
  4. Step 4: Simplify right side
    85,515.92x = 2,974,471,248.74
  5. Step 5: Solve for x
    x = 2,974,471,248.74/85,515.92
  6. Step 6: Final answer
    x = 34,782.66

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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.