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Finding the Fourth Proportional to 217,740.76, 326,484.01 and 84,465.28

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Solution

The fourth proportional to 217,740.76, 326,484.01 and 84,465.28 is: 126,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,740.76 : 326,484.01 = 84,465.28 : x
  2. Step 2: Convert to fraction form
    217,740.76/326,484.01 = 84,465.28/x
  3. Step 3: Cross multiply
    217,740.76x = 326,484.01 × 84,465.28
  4. Step 4: Simplify right side
    217,740.76x = 27,576,563,320.17
  5. Step 5: Solve for x
    x = 27,576,563,320.17/217,740.76
  6. Step 6: Final answer
    x = 126,648.60

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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.