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Finding the Fourth Proportional to 210,870.56, 316,305.57 and 68,715.61

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Solution

The fourth proportional to 210,870.56, 316,305.57 and 68,715.61 is: 103,073.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,870.56 : 316,305.57 = 68,715.61 : x
  2. Step 2: Convert to fraction form
    210,870.56/316,305.57 = 68,715.61/x
  3. Step 3: Cross multiply
    210,870.56x = 316,305.57 × 68,715.61
  4. Step 4: Simplify right side
    210,870.56x = 21,735,129,398.18
  5. Step 5: Solve for x
    x = 21,735,129,398.18/210,870.56
  6. Step 6: Final answer
    x = 103,073.33

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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.