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Finding the Fourth Proportional to 70,280.80, 96,989.80 and 40,065.56

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Solution

The fourth proportional to 70,280.80, 96,989.80 and 40,065.56 is: 55,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,280.80 : 96,989.80 = 40,065.56 : x
  2. Step 2: Convert to fraction form
    70,280.80/96,989.80 = 40,065.56/x
  3. Step 3: Cross multiply
    70,280.80x = 96,989.80 × 40,065.56
  4. Step 4: Simplify right side
    70,280.80x = 3,885,950,651.29
  5. Step 5: Solve for x
    x = 3,885,950,651.29/70,280.80
  6. Step 6: Final answer
    x = 55,291.78

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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.