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Finding the Fourth Proportional to 68,275.72, 102,428.70 and 28,866.52

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Solution

The fourth proportional to 68,275.72, 102,428.70 and 28,866.52 is: 43,306.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,275.72 : 102,428.70 = 28,866.52 : x
  2. Step 2: Convert to fraction form
    68,275.72/102,428.70 = 28,866.52/x
  3. Step 3: Cross multiply
    68,275.72x = 102,428.70 × 28,866.52
  4. Step 4: Simplify right side
    68,275.72x = 2,956,760,117.12
  5. Step 5: Solve for x
    x = 2,956,760,117.12/68,275.72
  6. Step 6: Final answer
    x = 43,306.17

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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.