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Finding the Fourth Proportional to 91,360.76, 136,978.77 and 48,672.57

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Solution

The fourth proportional to 91,360.76, 136,978.77 and 48,672.57 is: 72,975.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,360.76 : 136,978.77 = 48,672.57 : x
  2. Step 2: Convert to fraction form
    91,360.76/136,978.77 = 48,672.57/x
  3. Step 3: Cross multiply
    91,360.76x = 136,978.77 × 48,672.57
  4. Step 4: Simplify right side
    91,360.76x = 6,667,108,086.45
  5. Step 5: Solve for x
    x = 6,667,108,086.45/91,360.76
  6. Step 6: Final answer
    x = 72,975.62

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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.