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Finding the Fourth Proportional to 298,001.78, 447,002.66 and 87,639.71

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Solution

The fourth proportional to 298,001.78, 447,002.66 and 87,639.71 is: 131,459.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,001.78 : 447,002.66 = 87,639.71 : x
  2. Step 2: Convert to fraction form
    298,001.78/447,002.66 = 87,639.71/x
  3. Step 3: Cross multiply
    298,001.78x = 447,002.66 × 87,639.71
  4. Step 4: Simplify right side
    298,001.78x = 39,175,184,828.23
  5. Step 5: Solve for x
    x = 39,175,184,828.23/298,001.78
  6. Step 6: Final answer
    x = 131,459.57

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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.