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Finding the Fourth Proportional to 217,359.90, 326,039.85 and 99,261.90

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Solution

The fourth proportional to 217,359.90, 326,039.85 and 99,261.90 is: 148,892.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,359.90 : 326,039.85 = 99,261.90 : x
  2. Step 2: Convert to fraction form
    217,359.90/326,039.85 = 99,261.90/x
  3. Step 3: Cross multiply
    217,359.90x = 326,039.85 × 99,261.90
  4. Step 4: Simplify right side
    217,359.90x = 32,363,334,986.72
  5. Step 5: Solve for x
    x = 32,363,334,986.72/217,359.90
  6. Step 6: Final answer
    x = 148,892.85

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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.