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Finding the Fourth Proportional to 216,671.26, 324,830.73 and 90,405.55

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Solution

The fourth proportional to 216,671.26, 324,830.73 and 90,405.55 is: 135,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,671.26 : 324,830.73 = 90,405.55 : x
  2. Step 2: Convert to fraction form
    216,671.26/324,830.73 = 90,405.55/x
  3. Step 3: Cross multiply
    216,671.26x = 324,830.73 × 90,405.55
  4. Step 4: Simplify right side
    216,671.26x = 29,366,500,802.55
  5. Step 5: Solve for x
    x = 29,366,500,802.55/216,671.26
  6. Step 6: Final answer
    x = 135,534.82

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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.