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Finding the Fourth Proportional to 201,540.80, 302,238.30 and 81,547.40

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Solution

The fourth proportional to 201,540.80, 302,238.30 and 81,547.40 is: 122,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,540.80 : 302,238.30 = 81,547.40 : x
  2. Step 2: Convert to fraction form
    201,540.80/302,238.30 = 81,547.40/x
  3. Step 3: Cross multiply
    201,540.80x = 302,238.30 × 81,547.40
  4. Step 4: Simplify right side
    201,540.80x = 24,646,747,545.42
  5. Step 5: Solve for x
    x = 24,646,747,545.42/201,540.80
  6. Step 6: Final answer
    x = 122,291.60

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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.