Home / 81,300.08-121,956.96-31,378.16

Finding the Fourth Proportional to 81,300.08, 121,956.96 and 31,378.16

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Solution

The fourth proportional to 81,300.08, 121,956.96 and 31,378.16 is: 47,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,300.08 : 121,956.96 = 31,378.16 : x
  2. Step 2: Convert to fraction form
    81,300.08/121,956.96 = 31,378.16/x
  3. Step 3: Cross multiply
    81,300.08x = 121,956.96 × 31,378.16
  4. Step 4: Simplify right side
    81,300.08x = 3,826,785,003.99
  5. Step 5: Solve for x
    x = 3,826,785,003.99/81,300.08
  6. Step 6: Final answer
    x = 47,069.88

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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.