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Finding the Fourth Proportional to 105,286.84, 145,049.53 and 73,398.76

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Solution

The fourth proportional to 105,286.84, 145,049.53 and 73,398.76 is: 101,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,286.84 : 145,049.53 = 73,398.76 : x
  2. Step 2: Convert to fraction form
    105,286.84/145,049.53 = 73,398.76/x
  3. Step 3: Cross multiply
    105,286.84x = 145,049.53 × 73,398.76
  4. Step 4: Simplify right side
    105,286.84x = 10,646,454,548.34
  5. Step 5: Solve for x
    x = 10,646,454,548.34/105,286.84
  6. Step 6: Final answer
    x = 101,118.57

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1.5x scale

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.