Home / 136,678.47-188,514.45-100,368.49

Finding the Fourth Proportional to 136,678.47, 188,514.45 and 100,368.49

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Solution

The fourth proportional to 136,678.47, 188,514.45 and 100,368.49 is: 138,433.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,678.47 : 188,514.45 = 100,368.49 : x
  2. Step 2: Convert to fraction form
    136,678.47/188,514.45 = 100,368.49/x
  3. Step 3: Cross multiply
    136,678.47x = 188,514.45 × 100,368.49
  4. Step 4: Simplify right side
    136,678.47x = 18,920,910,689.68
  5. Step 5: Solve for x
    x = 18,920,910,689.68/136,678.47
  6. Step 6: Final answer
    x = 138,433.73

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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.