Home / 85,883.40-128,851.92-38,538.18

Finding the Fourth Proportional to 85,883.40, 128,851.92 and 38,538.18

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Solution

The fourth proportional to 85,883.40, 128,851.92 and 38,538.18 is: 57,819.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,883.40 : 128,851.92 = 38,538.18 : x
  2. Step 2: Convert to fraction form
    85,883.40/128,851.92 = 38,538.18/x
  3. Step 3: Cross multiply
    85,883.40x = 128,851.92 × 38,538.18
  4. Step 4: Simplify right side
    85,883.40x = 4,965,718,486.31
  5. Step 5: Solve for x
    x = 4,965,718,486.31/85,883.40
  6. Step 6: Final answer
    x = 57,819.30

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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.