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Finding the Fourth Proportional to 216,588.76, 324,664.98 and 90,298.90

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Solution

The fourth proportional to 216,588.76, 324,664.98 and 90,298.90 is: 135,357.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,588.76 : 324,664.98 = 90,298.90 : x
  2. Step 2: Convert to fraction form
    216,588.76/324,664.98 = 90,298.90/x
  3. Step 3: Cross multiply
    216,588.76x = 324,664.98 × 90,298.90
  4. Step 4: Simplify right side
    216,588.76x = 29,316,890,562.52
  5. Step 5: Solve for x
    x = 29,316,890,562.52/216,588.76
  6. Step 6: Final answer
    x = 135,357.40

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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.