Home / 138,714.03-191,426.02-78,287.22

Finding the Fourth Proportional to 138,714.03, 191,426.02 and 78,287.22

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Solution

The fourth proportional to 138,714.03, 191,426.02 and 78,287.22 is: 108,036.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,714.03 : 191,426.02 = 78,287.22 : x
  2. Step 2: Convert to fraction form
    138,714.03/191,426.02 = 78,287.22/x
  3. Step 3: Cross multiply
    138,714.03x = 191,426.02 × 78,287.22
  4. Step 4: Simplify right side
    138,714.03x = 14,986,210,745.75
  5. Step 5: Solve for x
    x = 14,986,210,745.75/138,714.03
  6. Step 6: Final answer
    x = 108,036.73

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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.