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Finding the Fourth Proportional to 217,200.90, 325,542.15 and 90,840.90

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Solution

The fourth proportional to 217,200.90, 325,542.15 and 90,840.90 is: 136,152.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,200.90 : 325,542.15 = 90,840.90 : x
  2. Step 2: Convert to fraction form
    217,200.90/325,542.15 = 90,840.90/x
  3. Step 3: Cross multiply
    217,200.90x = 325,542.15 × 90,840.90
  4. Step 4: Simplify right side
    217,200.90x = 29,572,541,893.94
  5. Step 5: Solve for x
    x = 29,572,541,893.94/217,200.90
  6. Step 6: Final answer
    x = 136,152.94

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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.