Home / 102,856.20-154,284.30-74,643.90

Finding the Fourth Proportional to 102,856.20, 154,284.30 and 74,643.90

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Solution

The fourth proportional to 102,856.20, 154,284.30 and 74,643.90 is: 111,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,856.20 : 154,284.30 = 74,643.90 : x
  2. Step 2: Convert to fraction form
    102,856.20/154,284.30 = 74,643.90/x
  3. Step 3: Cross multiply
    102,856.20x = 154,284.30 × 74,643.90
  4. Step 4: Simplify right side
    102,856.20x = 11,516,381,860.77
  5. Step 5: Solve for x
    x = 11,516,381,860.77/102,856.20
  6. Step 6: Final answer
    x = 111,965.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.