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Finding the Fourth Proportional to 85,527.08, 128,311.54 and 60,275.86

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Solution

The fourth proportional to 85,527.08, 128,311.54 and 60,275.86 is: 90,428.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,527.08 : 128,311.54 = 60,275.86 : x
  2. Step 2: Convert to fraction form
    85,527.08/128,311.54 = 60,275.86/x
  3. Step 3: Cross multiply
    85,527.08x = 128,311.54 × 60,275.86
  4. Step 4: Simplify right side
    85,527.08x = 7,734,087,949.96
  5. Step 5: Solve for x
    x = 7,734,087,949.96/85,527.08
  6. Step 6: Final answer
    x = 90,428.53

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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.