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Finding the Fourth Proportional to 159,587.79, 220,231.10 and 87,969.01

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Solution

The fourth proportional to 159,587.79, 220,231.10 and 87,969.01 is: 121,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,587.79 : 220,231.10 = 87,969.01 : x
  2. Step 2: Convert to fraction form
    159,587.79/220,231.10 = 87,969.01/x
  3. Step 3: Cross multiply
    159,587.79x = 220,231.10 × 87,969.01
  4. Step 4: Simplify right side
    159,587.79x = 19,373,510,847.79
  5. Step 5: Solve for x
    x = 19,373,510,847.79/159,587.79
  6. Step 6: Final answer
    x = 121,397.20

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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.