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Finding the Fourth Proportional to 159,126.80, 219,594.69 and 91,165.77

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Solution

The fourth proportional to 159,126.80, 219,594.69 and 91,165.77 is: 125,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,126.80 : 219,594.69 = 91,165.77 : x
  2. Step 2: Convert to fraction form
    159,126.80/219,594.69 = 91,165.77/x
  3. Step 3: Cross multiply
    159,126.80x = 219,594.69 × 91,165.77
  4. Step 4: Simplify right side
    159,126.80x = 20,019,519,001.76
  5. Step 5: Solve for x
    x = 20,019,519,001.76/159,126.80
  6. Step 6: Final answer
    x = 125,808.60

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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.