Home / 81,947.12-112,964.16-66,816.56

Finding the Fourth Proportional to 81,947.12, 112,964.16 and 66,816.56

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Solution

The fourth proportional to 81,947.12, 112,964.16 and 66,816.56 is: 92,106.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,947.12 : 112,964.16 = 66,816.56 : x
  2. Step 2: Convert to fraction form
    81,947.12/112,964.16 = 66,816.56/x
  3. Step 3: Cross multiply
    81,947.12x = 112,964.16 × 66,816.56
  4. Step 4: Simplify right side
    81,947.12x = 7,547,876,574.49
  5. Step 5: Solve for x
    x = 7,547,876,574.49/81,947.12
  6. Step 6: Final answer
    x = 92,106.67

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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.