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Finding the Fourth Proportional to 159,643.80, 239,465.70 and 131,103.45

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Solution

The fourth proportional to 159,643.80, 239,465.70 and 131,103.45 is: 196,655.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,643.80 : 239,465.70 = 131,103.45 : x
  2. Step 2: Convert to fraction form
    159,643.80/239,465.70 = 131,103.45/x
  3. Step 3: Cross multiply
    159,643.80x = 239,465.70 × 131,103.45
  4. Step 4: Simplify right side
    159,643.80x = 31,394,779,426.67
  5. Step 5: Solve for x
    x = 31,394,779,426.67/159,643.80
  6. Step 6: Final answer
    x = 196,655.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.