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Finding the Fourth Proportional to 147,920.80, 222,118.80 and 137,005.60

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Solution

The fourth proportional to 147,920.80, 222,118.80 and 137,005.60 is: 205,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,920.80 : 222,118.80 = 137,005.60 : x
  2. Step 2: Convert to fraction form
    147,920.80/222,118.80 = 137,005.60/x
  3. Step 3: Cross multiply
    147,920.80x = 222,118.80 × 137,005.60
  4. Step 4: Simplify right side
    147,920.80x = 30,431,519,465.28
  5. Step 5: Solve for x
    x = 30,431,519,465.28/147,920.80
  6. Step 6: Final answer
    x = 205,728.47

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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.