Home / 78,786.15-118,108.15-28,831.43

Finding the Fourth Proportional to 78,786.15, 118,108.15 and 28,831.43

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Solution

The fourth proportional to 78,786.15, 118,108.15 and 28,831.43 is: 43,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.15 : 118,108.15 = 28,831.43 : x
  2. Step 2: Convert to fraction form
    78,786.15/118,108.15 = 28,831.43/x
  3. Step 3: Cross multiply
    78,786.15x = 118,108.15 × 28,831.43
  4. Step 4: Simplify right side
    78,786.15x = 3,405,226,124.46
  5. Step 5: Solve for x
    x = 3,405,226,124.46/78,786.15
  6. Step 6: Final answer
    x = 43,221.13

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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.