Home / 56,279.28-77,662.13-30,780.88

Finding the Fourth Proportional to 56,279.28, 77,662.13 and 30,780.88

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Solution

The fourth proportional to 56,279.28, 77,662.13 and 30,780.88 is: 42,475.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,279.28 : 77,662.13 = 30,780.88 : x
  2. Step 2: Convert to fraction form
    56,279.28/77,662.13 = 30,780.88/x
  3. Step 3: Cross multiply
    56,279.28x = 77,662.13 × 30,780.88
  4. Step 4: Simplify right side
    56,279.28x = 2,390,508,704.07
  5. Step 5: Solve for x
    x = 2,390,508,704.07/56,279.28
  6. Step 6: Final answer
    x = 42,475.82

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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.