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Finding the Fourth Proportional to 129,703.72, 178,990.24 and 75,977.22

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Solution

The fourth proportional to 129,703.72, 178,990.24 and 75,977.22 is: 104,848.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,703.72 : 178,990.24 = 75,977.22 : x
  2. Step 2: Convert to fraction form
    129,703.72/178,990.24 = 75,977.22/x
  3. Step 3: Cross multiply
    129,703.72x = 178,990.24 × 75,977.22
  4. Step 4: Simplify right side
    129,703.72x = 13,599,180,842.33
  5. Step 5: Solve for x
    x = 13,599,180,842.33/129,703.72
  6. Step 6: Final answer
    x = 104,848.04

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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.