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Finding the Fourth Proportional to 80,532.94, 120,774.78 and 38,390.80

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Solution

The fourth proportional to 80,532.94, 120,774.78 and 38,390.80 is: 57,574.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,532.94 : 120,774.78 = 38,390.80 : x
  2. Step 2: Convert to fraction form
    80,532.94/120,774.78 = 38,390.80/x
  3. Step 3: Cross multiply
    80,532.94x = 120,774.78 × 38,390.80
  4. Step 4: Simplify right side
    80,532.94x = 4,636,640,424.02
  5. Step 5: Solve for x
    x = 4,636,640,424.02/80,532.94
  6. Step 6: Final answer
    x = 57,574.46

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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.