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Finding the Fourth Proportional to 255,487.54, 383,290.66 and 87,009.31

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Solution

The fourth proportional to 255,487.54, 383,290.66 and 87,009.31 is: 130,534.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,487.54 : 383,290.66 = 87,009.31 : x
  2. Step 2: Convert to fraction form
    255,487.54/383,290.66 = 87,009.31/x
  3. Step 3: Cross multiply
    255,487.54x = 383,290.66 × 87,009.31
  4. Step 4: Simplify right side
    255,487.54x = 33,349,855,856.04
  5. Step 5: Solve for x
    x = 33,349,855,856.04/255,487.54
  6. Step 6: Final answer
    x = 130,534.18

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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.