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Finding the Fourth Proportional to 129,976.54, 195,026.80 and 70,810.90

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Solution

The fourth proportional to 129,976.54, 195,026.80 and 70,810.90 is: 106,250.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,976.54 : 195,026.80 = 70,810.90 : x
  2. Step 2: Convert to fraction form
    129,976.54/195,026.80 = 70,810.90/x
  3. Step 3: Cross multiply
    129,976.54x = 195,026.80 × 70,810.90
  4. Step 4: Simplify right side
    129,976.54x = 13,810,023,232.12
  5. Step 5: Solve for x
    x = 13,810,023,232.12/129,976.54
  6. Step 6: Final answer
    x = 106,250.12

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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.