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Finding the Fourth Proportional to 91,360.35, 136,978.16 and 48,672.16

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Solution

The fourth proportional to 91,360.35, 136,978.16 and 48,672.16 is: 72,975.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,360.35 : 136,978.16 = 48,672.16 : x
  2. Step 2: Convert to fraction form
    91,360.35/136,978.16 = 48,672.16/x
  3. Step 3: Cross multiply
    91,360.35x = 136,978.16 × 48,672.16
  4. Step 4: Simplify right side
    91,360.35x = 6,667,023,475.41
  5. Step 5: Solve for x
    x = 6,667,023,475.41/91,360.35
  6. Step 6: Final answer
    x = 72,975.02

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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.