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Finding the Fourth Proportional to 159,971.16, 220,802.90 and 91,995.56

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Solution

The fourth proportional to 159,971.16, 220,802.90 and 91,995.56 is: 126,978.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,971.16 : 220,802.90 = 91,995.56 : x
  2. Step 2: Convert to fraction form
    159,971.16/220,802.90 = 91,995.56/x
  3. Step 3: Cross multiply
    159,971.16x = 220,802.90 × 91,995.56
  4. Step 4: Simplify right side
    159,971.16x = 20,312,886,435.12
  5. Step 5: Solve for x
    x = 20,312,886,435.12/159,971.16
  6. Step 6: Final answer
    x = 126,978.43

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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.