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Finding the Fourth Proportional to 66,868.54, 92,275.81 and 39,995.17

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Solution

The fourth proportional to 66,868.54, 92,275.81 and 39,995.17 is: 55,191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,868.54 : 92,275.81 = 39,995.17 : x
  2. Step 2: Convert to fraction form
    66,868.54/92,275.81 = 39,995.17/x
  3. Step 3: Cross multiply
    66,868.54x = 92,275.81 × 39,995.17
  4. Step 4: Simplify right side
    66,868.54x = 3,690,586,377.16
  5. Step 5: Solve for x
    x = 3,690,586,377.16/66,868.54
  6. Step 6: Final answer
    x = 55,191.67

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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.