Home / 136,028.76-187,698.24-78,646.74

Finding the Fourth Proportional to 136,028.76, 187,698.24 and 78,646.74

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Solution

The fourth proportional to 136,028.76, 187,698.24 and 78,646.74 is: 108,520.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,028.76 : 187,698.24 = 78,646.74 : x
  2. Step 2: Convert to fraction form
    136,028.76/187,698.24 = 78,646.74/x
  3. Step 3: Cross multiply
    136,028.76x = 187,698.24 × 78,646.74
  4. Step 4: Simplify right side
    136,028.76x = 14,761,854,679.74
  5. Step 5: Solve for x
    x = 14,761,854,679.74/136,028.76
  6. Step 6: Final answer
    x = 108,520.10

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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.