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Finding the Fourth Proportional to 255,707.80, 383,601.11 and 87,188.71

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Solution

The fourth proportional to 255,707.80, 383,601.11 and 87,188.71 is: 130,796.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,707.80 : 383,601.11 = 87,188.71 : x
  2. Step 2: Convert to fraction form
    255,707.80/383,601.11 = 87,188.71/x
  3. Step 3: Cross multiply
    255,707.80x = 383,601.11 × 87,188.71
  4. Step 4: Simplify right side
    255,707.80x = 33,445,685,935.47
  5. Step 5: Solve for x
    x = 33,445,685,935.47/255,707.80
  6. Step 6: Final answer
    x = 130,796.50

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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.