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Finding the Fourth Proportional to 159,891.91, 220,647.33 and 87,292.32

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Solution

The fourth proportional to 159,891.91, 220,647.33 and 87,292.32 is: 120,461.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,891.91 : 220,647.33 = 87,292.32 : x
  2. Step 2: Convert to fraction form
    159,891.91/220,647.33 = 87,292.32/x
  3. Step 3: Cross multiply
    159,891.91x = 220,647.33 × 87,292.32
  4. Step 4: Simplify right side
    159,891.91x = 19,260,817,337.51
  5. Step 5: Solve for x
    x = 19,260,817,337.51/159,891.91
  6. Step 6: Final answer
    x = 120,461.49

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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.