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Finding the Fourth Proportional to 281,012.94, 421,424.17 and 91,426.46

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Solution

The fourth proportional to 281,012.94, 421,424.17 and 91,426.46 is: 137,108.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,012.94 : 421,424.17 = 91,426.46 : x
  2. Step 2: Convert to fraction form
    281,012.94/421,424.17 = 91,426.46/x
  3. Step 3: Cross multiply
    281,012.94x = 421,424.17 × 91,426.46
  4. Step 4: Simplify right side
    281,012.94x = 38,529,317,685.85
  5. Step 5: Solve for x
    x = 38,529,317,685.85/281,012.94
  6. Step 6: Final answer
    x = 137,108.70

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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.