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Finding the Fourth Proportional to 145,162.99, 200,334.78 and 80,639.59

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Solution

The fourth proportional to 145,162.99, 200,334.78 and 80,639.59 is: 111,288.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,162.99 : 200,334.78 = 80,639.59 : x
  2. Step 2: Convert to fraction form
    145,162.99/200,334.78 = 80,639.59/x
  3. Step 3: Cross multiply
    145,162.99x = 200,334.78 × 80,639.59
  4. Step 4: Simplify right side
    145,162.99x = 16,154,914,521.94
  5. Step 5: Solve for x
    x = 16,154,914,521.94/145,162.99
  6. Step 6: Final answer
    x = 111,288.11

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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.