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Finding the Fourth Proportional to 217,706.90, 326,310.59 and 91,323.77

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Solution

The fourth proportional to 217,706.90, 326,310.59 and 91,323.77 is: 136,880.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,706.90 : 326,310.59 = 91,323.77 : x
  2. Step 2: Convert to fraction form
    217,706.90/326,310.59 = 91,323.77/x
  3. Step 3: Cross multiply
    217,706.90x = 326,310.59 × 91,323.77
  4. Step 4: Simplify right side
    217,706.90x = 29,799,913,269.72
  5. Step 5: Solve for x
    x = 29,799,913,269.72/217,706.90
  6. Step 6: Final answer
    x = 136,880.89

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1.5x scale

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.