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Finding the Fourth Proportional to 268,143.80, 402,215.70 and 101,910.20

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Solution

The fourth proportional to 268,143.80, 402,215.70 and 101,910.20 is: 152,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,143.80 : 402,215.70 = 101,910.20 : x
  2. Step 2: Convert to fraction form
    268,143.80/402,215.70 = 101,910.20/x
  3. Step 3: Cross multiply
    268,143.80x = 402,215.70 × 101,910.20
  4. Step 4: Simplify right side
    268,143.80x = 40,989,882,430.14
  5. Step 5: Solve for x
    x = 40,989,882,430.14/268,143.80
  6. Step 6: Final answer
    x = 152,865.30

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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.