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Finding the Fourth Proportional to 222,138.79, 306,549.59 and 125,343.36

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Solution

The fourth proportional to 222,138.79, 306,549.59 and 125,343.36 is: 172,972.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,138.79 : 306,549.59 = 125,343.36 : x
  2. Step 2: Convert to fraction form
    222,138.79/306,549.59 = 125,343.36/x
  3. Step 3: Cross multiply
    222,138.79x = 306,549.59 × 125,343.36
  4. Step 4: Simplify right side
    222,138.79x = 38,423,954,990.51
  5. Step 5: Solve for x
    x = 38,423,954,990.51/222,138.79
  6. Step 6: Final answer
    x = 172,972.74

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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.