Home / 138,708.12-191,435.38-103,000.08

Finding the Fourth Proportional to 138,708.12, 191,435.38 and 103,000.08

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Solution

The fourth proportional to 138,708.12, 191,435.38 and 103,000.08 is: 142,153.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,708.12 : 191,435.38 = 103,000.08 : x
  2. Step 2: Convert to fraction form
    138,708.12/191,435.38 = 103,000.08/x
  3. Step 3: Cross multiply
    138,708.12x = 191,435.38 × 103,000.08
  4. Step 4: Simplify right side
    138,708.12x = 19,717,859,454.83
  5. Step 5: Solve for x
    x = 19,717,859,454.83/138,708.12
  6. Step 6: Final answer
    x = 142,153.61

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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.