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Finding the Fourth Proportional to 130,415.80, 195,630.10 and 68,207.80

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Solution

The fourth proportional to 130,415.80, 195,630.10 and 68,207.80 is: 102,315.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,415.80 : 195,630.10 = 68,207.80 : x
  2. Step 2: Convert to fraction form
    130,415.80/195,630.10 = 68,207.80/x
  3. Step 3: Cross multiply
    130,415.80x = 195,630.10 × 68,207.80
  4. Step 4: Simplify right side
    130,415.80x = 13,343,498,734.78
  5. Step 5: Solve for x
    x = 13,343,498,734.78/130,415.80
  6. Step 6: Final answer
    x = 102,315.05

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1.5x scale

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.