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Finding the Fourth Proportional to 140,342.76, 210,562.74 and 87,689.52

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Solution

The fourth proportional to 140,342.76, 210,562.74 and 87,689.52 is: 131,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,342.76 : 210,562.74 = 87,689.52 : x
  2. Step 2: Convert to fraction form
    140,342.76/210,562.74 = 87,689.52/x
  3. Step 3: Cross multiply
    140,342.76x = 210,562.74 × 87,689.52
  4. Step 4: Simplify right side
    140,342.76x = 18,464,145,600.48
  5. Step 5: Solve for x
    x = 18,464,145,600.48/140,342.76
  6. Step 6: Final answer
    x = 131,564.65

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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.