Home / 56,129.91-77,458.12-30,636.78

Finding the Fourth Proportional to 56,129.91, 77,458.12 and 30,636.78

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Solution

The fourth proportional to 56,129.91, 77,458.12 and 30,636.78 is: 42,278.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,129.91 : 77,458.12 = 30,636.78 : x
  2. Step 2: Convert to fraction form
    56,129.91/77,458.12 = 30,636.78/x
  3. Step 3: Cross multiply
    56,129.91x = 77,458.12 × 30,636.78
  4. Step 4: Simplify right side
    56,129.91x = 2,373,067,305.06
  5. Step 5: Solve for x
    x = 2,373,067,305.06/56,129.91
  6. Step 6: Final answer
    x = 42,278.12

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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.