Home / 85,525.07-128,287.60-38,127.92

Finding the Fourth Proportional to 85,525.07, 128,287.60 and 38,127.92

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Solution

The fourth proportional to 85,525.07, 128,287.60 and 38,127.92 is: 57,191.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,525.07 : 128,287.60 = 38,127.92 : x
  2. Step 2: Convert to fraction form
    85,525.07/128,287.60 = 38,127.92/x
  3. Step 3: Cross multiply
    85,525.07x = 128,287.60 × 38,127.92
  4. Step 4: Simplify right side
    85,525.07x = 4,891,338,613.03
  5. Step 5: Solve for x
    x = 4,891,338,613.03/85,525.07
  6. Step 6: Final answer
    x = 57,191.87

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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.