Home / 90,747.60-136,056.60-51,316.80

Finding the Fourth Proportional to 90,747.60, 136,056.60 and 51,316.80

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Solution

The fourth proportional to 90,747.60, 136,056.60 and 51,316.80 is: 76,938.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,747.60 : 136,056.60 = 51,316.80 : x
  2. Step 2: Convert to fraction form
    90,747.60/136,056.60 = 51,316.80/x
  3. Step 3: Cross multiply
    90,747.60x = 136,056.60 × 51,316.80
  4. Step 4: Simplify right side
    90,747.60x = 6,981,989,330.88
  5. Step 5: Solve for x
    x = 6,981,989,330.88/90,747.60
  6. Step 6: Final answer
    x = 76,938.56

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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.