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Finding the Fourth Proportional to 90,513.60, 135,770.28 and 51,052.80

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Solution

The fourth proportional to 90,513.60, 135,770.28 and 51,052.80 is: 76,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,513.60 : 135,770.28 = 51,052.80 : x
  2. Step 2: Convert to fraction form
    90,513.60/135,770.28 = 51,052.80/x
  3. Step 3: Cross multiply
    90,513.60x = 135,770.28 × 51,052.80
  4. Step 4: Simplify right side
    90,513.60x = 6,931,452,950.78
  5. Step 5: Solve for x
    x = 6,931,452,950.78/90,513.60
  6. Step 6: Final answer
    x = 76,579.13

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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.