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Finding the Fourth Proportional to 85,551.96, 128,360.79 and 60,275.76

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Solution

The fourth proportional to 85,551.96, 128,360.79 and 60,275.76 is: 90,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.96 : 128,360.79 = 60,275.76 : x
  2. Step 2: Convert to fraction form
    85,551.96/128,360.79 = 60,275.76/x
  3. Step 3: Cross multiply
    85,551.96x = 128,360.79 × 60,275.76
  4. Step 4: Simplify right side
    85,551.96x = 7,737,044,171.45
  5. Step 5: Solve for x
    x = 7,737,044,171.45/85,551.96
  6. Step 6: Final answer
    x = 90,436.78

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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.