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Finding the Fourth Proportional to 39,706.88, 55,154.72 and 39,071.84

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Solution

The fourth proportional to 39,706.88, 55,154.72 and 39,071.84 is: 54,272.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,706.88 : 55,154.72 = 39,071.84 : x
  2. Step 2: Convert to fraction form
    39,706.88/55,154.72 = 39,071.84/x
  3. Step 3: Cross multiply
    39,706.88x = 55,154.72 × 39,071.84
  4. Step 4: Simplify right side
    39,706.88x = 2,154,996,395.08
  5. Step 5: Solve for x
    x = 2,154,996,395.08/39,706.88
  6. Step 6: Final answer
    x = 54,272.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.