Home / 138,726.41-191,443.30-78,299.60

Finding the Fourth Proportional to 138,726.41, 191,443.30 and 78,299.60

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Solution

The fourth proportional to 138,726.41, 191,443.30 and 78,299.60 is: 108,053.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,726.41 : 191,443.30 = 78,299.60 : x
  2. Step 2: Convert to fraction form
    138,726.41/191,443.30 = 78,299.60/x
  3. Step 3: Cross multiply
    138,726.41x = 191,443.30 × 78,299.60
  4. Step 4: Simplify right side
    138,726.41x = 14,989,932,659.71
  5. Step 5: Solve for x
    x = 14,989,932,659.71/138,726.41
  6. Step 6: Final answer
    x = 108,053.93

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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.