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Finding the Fourth Proportional to 121,554.54, 167,670.90 and 80,720.55

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Solution

The fourth proportional to 121,554.54, 167,670.90 and 80,720.55 is: 111,344.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,554.54 : 167,670.90 = 80,720.55 : x
  2. Step 2: Convert to fraction form
    121,554.54/167,670.90 = 80,720.55/x
  3. Step 3: Cross multiply
    121,554.54x = 167,670.90 × 80,720.55
  4. Step 4: Simplify right side
    121,554.54x = 13,534,487,267.00
  5. Step 5: Solve for x
    x = 13,534,487,267.00/121,554.54
  6. Step 6: Final answer
    x = 111,344.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.