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Finding the Fourth Proportional to 216,061.60, 323,977.20 and 91,261.60

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Solution

The fourth proportional to 216,061.60, 323,977.20 and 91,261.60 is: 136,843.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,061.60 : 323,977.20 = 91,261.60 : x
  2. Step 2: Convert to fraction form
    216,061.60/323,977.20 = 91,261.60/x
  3. Step 3: Cross multiply
    216,061.60x = 323,977.20 × 91,261.60
  4. Step 4: Simplify right side
    216,061.60x = 29,566,677,635.52
  5. Step 5: Solve for x
    x = 29,566,677,635.52/216,061.60
  6. Step 6: Final answer
    x = 136,843.74

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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.