Home / 132,433.86-198,455.40-78,342.61

Finding the Fourth Proportional to 132,433.86, 198,455.40 and 78,342.61

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Solution

The fourth proportional to 132,433.86, 198,455.40 and 78,342.61 is: 117,398.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,433.86 : 198,455.40 = 78,342.61 : x
  2. Step 2: Convert to fraction form
    132,433.86/198,455.40 = 78,342.61/x
  3. Step 3: Cross multiply
    132,433.86x = 198,455.40 × 78,342.61
  4. Step 4: Simplify right side
    132,433.86x = 15,547,514,629.68
  5. Step 5: Solve for x
    x = 15,547,514,629.68/132,433.86
  6. Step 6: Final answer
    x = 117,398.33

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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.