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Finding the Fourth Proportional to 312,501.91, 468,780.56 and 87,864.31

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Solution

The fourth proportional to 312,501.91, 468,780.56 and 87,864.31 is: 131,804.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,501.91 : 468,780.56 = 87,864.31 : x
  2. Step 2: Convert to fraction form
    312,501.91/468,780.56 = 87,864.31/x
  3. Step 3: Cross multiply
    312,501.91x = 468,780.56 × 87,864.31
  4. Step 4: Simplify right side
    312,501.91x = 41,189,080,445.81
  5. Step 5: Solve for x
    x = 41,189,080,445.81/312,501.91
  6. Step 6: Final answer
    x = 131,804.25

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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.