Home / 85,956.32-128,346.22-77,013.92

Finding the Fourth Proportional to 85,956.32, 128,346.22 and 77,013.92

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Solution

The fourth proportional to 85,956.32, 128,346.22 and 77,013.92 is: 114,993.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,956.32 : 128,346.22 = 77,013.92 : x
  2. Step 2: Convert to fraction form
    85,956.32/128,346.22 = 77,013.92/x
  3. Step 3: Cross multiply
    85,956.32x = 128,346.22 × 77,013.92
  4. Step 4: Simplify right side
    85,956.32x = 9,884,445,519.38
  5. Step 5: Solve for x
    x = 9,884,445,519.38/85,956.32
  6. Step 6: Final answer
    x = 114,993.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.