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Finding the Fourth Proportional to 138,466.40, 207,622.80 and 55,266.40

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Solution

The fourth proportional to 138,466.40, 207,622.80 and 55,266.40 is: 82,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,466.40 : 207,622.80 = 55,266.40 : x
  2. Step 2: Convert to fraction form
    138,466.40/207,622.80 = 55,266.40/x
  3. Step 3: Cross multiply
    138,466.40x = 207,622.80 × 55,266.40
  4. Step 4: Simplify right side
    138,466.40x = 11,474,564,713.92
  5. Step 5: Solve for x
    x = 11,474,564,713.92/138,466.40
  6. Step 6: Final answer
    x = 82,868.95

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1.5x scale

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.