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Finding the Fourth Proportional to 142,407.70, 196,343.99 and 91,330.31

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Solution

The fourth proportional to 142,407.70, 196,343.99 and 91,330.31 is: 125,921.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,407.70 : 196,343.99 = 91,330.31 : x
  2. Step 2: Convert to fraction form
    142,407.70/196,343.99 = 91,330.31/x
  3. Step 3: Cross multiply
    142,407.70x = 196,343.99 × 91,330.31
  4. Step 4: Simplify right side
    142,407.70x = 17,932,157,850.03
  5. Step 5: Solve for x
    x = 17,932,157,850.03/142,407.70
  6. Step 6: Final answer
    x = 125,921.27

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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.