Home / 78,786.65-118,108.90-28,831.93

Finding the Fourth Proportional to 78,786.65, 118,108.90 and 28,831.93

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Solution

The fourth proportional to 78,786.65, 118,108.90 and 28,831.93 is: 43,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.65 : 118,108.90 = 28,831.93 : x
  2. Step 2: Convert to fraction form
    78,786.65/118,108.90 = 28,831.93/x
  3. Step 3: Cross multiply
    78,786.65x = 118,108.90 × 28,831.93
  4. Step 4: Simplify right side
    78,786.65x = 3,405,306,802.47
  5. Step 5: Solve for x
    x = 3,405,306,802.47/78,786.65
  6. Step 6: Final answer
    x = 43,221.88

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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.