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Finding the Fourth Proportional to 139,220.40, 208,839.03 and 39,388.17

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Solution

The fourth proportional to 139,220.40, 208,839.03 and 39,388.17 is: 59,084.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,220.40 : 208,839.03 = 39,388.17 : x
  2. Step 2: Convert to fraction form
    139,220.40/208,839.03 = 39,388.17/x
  3. Step 3: Cross multiply
    139,220.40x = 208,839.03 × 39,388.17
  4. Step 4: Simplify right side
    139,220.40x = 8,225,787,216.28
  5. Step 5: Solve for x
    x = 8,225,787,216.28/139,220.40
  6. Step 6: Final answer
    x = 59,084.64

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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.