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Finding the Fourth Proportional to 89,096.80, 133,681.20 and 39,186.40

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Solution

The fourth proportional to 89,096.80, 133,681.20 and 39,186.40 is: 58,795.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,096.80 : 133,681.20 = 39,186.40 : x
  2. Step 2: Convert to fraction form
    89,096.80/133,681.20 = 39,186.40/x
  3. Step 3: Cross multiply
    89,096.80x = 133,681.20 × 39,186.40
  4. Step 4: Simplify right side
    89,096.80x = 5,238,484,975.68
  5. Step 5: Solve for x
    x = 5,238,484,975.68/89,096.80
  6. Step 6: Final answer
    x = 58,795.43

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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.