Home / 210,865.68-316,282.32-77,721.12

Finding the Fourth Proportional to 210,865.68, 316,282.32 and 77,721.12

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Solution

The fourth proportional to 210,865.68, 316,282.32 and 77,721.12 is: 116,575.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,865.68 : 316,282.32 = 77,721.12 : x
  2. Step 2: Convert to fraction form
    210,865.68/316,282.32 = 77,721.12/x
  3. Step 3: Cross multiply
    210,865.68x = 316,282.32 × 77,721.12
  4. Step 4: Simplify right side
    210,865.68x = 24,581,816,146.60
  5. Step 5: Solve for x
    x = 24,581,816,146.60/210,865.68
  6. Step 6: Final answer
    x = 116,575.71

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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.