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Finding the Fourth Proportional to 85,021.80, 127,532.70 and 79,837.80

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Solution

The fourth proportional to 85,021.80, 127,532.70 and 79,837.80 is: 119,756.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,021.80 : 127,532.70 = 79,837.80 : x
  2. Step 2: Convert to fraction form
    85,021.80/127,532.70 = 79,837.80/x
  3. Step 3: Cross multiply
    85,021.80x = 127,532.70 × 79,837.80
  4. Step 4: Simplify right side
    85,021.80x = 10,181,930,196.06
  5. Step 5: Solve for x
    x = 10,181,930,196.06/85,021.80
  6. Step 6: Final answer
    x = 119,756.70

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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.