Home / 90,132.18-135,230.40-40,207.80

Finding the Fourth Proportional to 90,132.18, 135,230.40 and 40,207.80

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Solution

The fourth proportional to 90,132.18, 135,230.40 and 40,207.80 is: 60,326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,132.18 : 135,230.40 = 40,207.80 : x
  2. Step 2: Convert to fraction form
    90,132.18/135,230.40 = 40,207.80/x
  3. Step 3: Cross multiply
    90,132.18x = 135,230.40 × 40,207.80
  4. Step 4: Simplify right side
    90,132.18x = 5,437,316,877.12
  5. Step 5: Solve for x
    x = 5,437,316,877.12/90,132.18
  6. Step 6: Final answer
    x = 60,326.03

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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.