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Finding the Fourth Proportional to 103,315.44, 154,934.28 and 81,387.12

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Solution

The fourth proportional to 103,315.44, 154,934.28 and 81,387.12 is: 122,050.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,315.44 : 154,934.28 = 81,387.12 : x
  2. Step 2: Convert to fraction form
    103,315.44/154,934.28 = 81,387.12/x
  3. Step 3: Cross multiply
    103,315.44x = 154,934.28 × 81,387.12
  4. Step 4: Simplify right side
    103,315.44x = 12,609,654,838.47
  5. Step 5: Solve for x
    x = 12,609,654,838.47/103,315.44
  6. Step 6: Final answer
    x = 122,050.05

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1.5x scale

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.