Home / 78,986.86-118,480.26-31,623.26

Finding the Fourth Proportional to 78,986.86, 118,480.26 and 31,623.26

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Solution

The fourth proportional to 78,986.86, 118,480.26 and 31,623.26 is: 47,434.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986.86 : 118,480.26 = 31,623.26 : x
  2. Step 2: Convert to fraction form
    78,986.86/118,480.26 = 31,623.26/x
  3. Step 3: Cross multiply
    78,986.86x = 118,480.26 × 31,623.26
  4. Step 4: Simplify right side
    78,986.86x = 3,746,732,066.85
  5. Step 5: Solve for x
    x = 3,746,732,066.85/78,986.86
  6. Step 6: Final answer
    x = 47,434.88

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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.