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Finding the Fourth Proportional to 312,501.71, 468,780.28 and 87,864.12

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Solution

The fourth proportional to 312,501.71, 468,780.28 and 87,864.12 is: 131,803.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,501.71 : 468,780.28 = 87,864.12 : x
  2. Step 2: Convert to fraction form
    312,501.71/468,780.28 = 87,864.12/x
  3. Step 3: Cross multiply
    312,501.71x = 468,780.28 × 87,864.12
  4. Step 4: Simplify right side
    312,501.71x = 41,188,966,555.89
  5. Step 5: Solve for x
    x = 41,188,966,555.89/312,501.71
  6. Step 6: Final answer
    x = 131,803.97

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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.