Home / 81,290.14-112,218.74-61,154.68

Finding the Fourth Proportional to 81,290.14, 112,218.74 and 61,154.68

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Solution

The fourth proportional to 81,290.14, 112,218.74 and 61,154.68 is: 84,422.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,290.14 : 112,218.74 = 61,154.68 : x
  2. Step 2: Convert to fraction form
    81,290.14/112,218.74 = 61,154.68/x
  3. Step 3: Cross multiply
    81,290.14x = 112,218.74 × 61,154.68
  4. Step 4: Simplify right side
    81,290.14x = 6,862,701,134.70
  5. Step 5: Solve for x
    x = 6,862,701,134.70/81,290.14
  6. Step 6: Final answer
    x = 84,422.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.