Home / 85,543.20-128,314.80-82,262.70

Finding the Fourth Proportional to 85,543.20, 128,314.80 and 82,262.70

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Solution

The fourth proportional to 85,543.20, 128,314.80 and 82,262.70 is: 123,394.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543.20 : 128,314.80 = 82,262.70 : x
  2. Step 2: Convert to fraction form
    85,543.20/128,314.80 = 82,262.70/x
  3. Step 3: Cross multiply
    85,543.20x = 128,314.80 × 82,262.70
  4. Step 4: Simplify right side
    85,543.20x = 10,555,521,897.96
  5. Step 5: Solve for x
    x = 10,555,521,897.96/85,543.20
  6. Step 6: Final answer
    x = 123,394.05

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1.5x scale

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.