Home / 81,106.03-111,113.40-78,073.70

Finding the Fourth Proportional to 81,106.03, 111,113.40 and 78,073.70

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Solution

The fourth proportional to 81,106.03, 111,113.40 and 78,073.70 is: 106,959.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,106.03 : 111,113.40 = 78,073.70 : x
  2. Step 2: Convert to fraction form
    81,106.03/111,113.40 = 78,073.70/x
  3. Step 3: Cross multiply
    81,106.03x = 111,113.40 × 78,073.70
  4. Step 4: Simplify right side
    81,106.03x = 8,675,034,681.75
  5. Step 5: Solve for x
    x = 8,675,034,681.75/81,106.03
  6. Step 6: Final answer
    x = 106,959.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.