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Finding the Fourth Proportional to 210,095.68, 315,143.52 and 76,921.96

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Solution

The fourth proportional to 210,095.68, 315,143.52 and 76,921.96 is: 115,382.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,095.68 : 315,143.52 = 76,921.96 : x
  2. Step 2: Convert to fraction form
    210,095.68/315,143.52 = 76,921.96/x
  3. Step 3: Cross multiply
    210,095.68x = 315,143.52 × 76,921.96
  4. Step 4: Simplify right side
    210,095.68x = 24,241,457,239.70
  5. Step 5: Solve for x
    x = 24,241,457,239.70/210,095.68
  6. Step 6: Final answer
    x = 115,382.94

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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.