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Finding the Fourth Proportional to 70,228.80, 105,343.20 and 65,620.80

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Solution

The fourth proportional to 70,228.80, 105,343.20 and 65,620.80 is: 98,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,228.80 : 105,343.20 = 65,620.80 : x
  2. Step 2: Convert to fraction form
    70,228.80/105,343.20 = 65,620.80/x
  3. Step 3: Cross multiply
    70,228.80x = 105,343.20 × 65,620.80
  4. Step 4: Simplify right side
    70,228.80x = 6,912,705,058.56
  5. Step 5: Solve for x
    x = 6,912,705,058.56/70,228.80
  6. Step 6: Final answer
    x = 98,431.20

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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.