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Finding the Fourth Proportional to 45,674.64, 68,510.52 and 20,696.40

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Solution

The fourth proportional to 45,674.64, 68,510.52 and 20,696.40 is: 31,043.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,674.64 : 68,510.52 = 20,696.40 : x
  2. Step 2: Convert to fraction form
    45,674.64/68,510.52 = 20,696.40/x
  3. Step 3: Cross multiply
    45,674.64x = 68,510.52 × 20,696.40
  4. Step 4: Simplify right side
    45,674.64x = 1,417,921,126.13
  5. Step 5: Solve for x
    x = 1,417,921,126.13/45,674.64
  6. Step 6: Final answer
    x = 31,043.95

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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.