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Finding the Fourth Proportional to 89,487, 134,231.58 and 40,239

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Solution

The fourth proportional to 89,487, 134,231.58 and 40,239 is: 60,358.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,487 : 134,231.58 = 40,239 : x
  2. Step 2: Convert to fraction form
    89,487/134,231.58 = 40,239/x
  3. Step 3: Cross multiply
    89,487x = 134,231.58 × 40,239
  4. Step 4: Simplify right side
    89,487x = 5,401,344,547.62
  5. Step 5: Solve for x
    x = 5,401,344,547.62/89,487
  6. Step 6: Final answer
    x = 60,358.99

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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.