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Finding the Fourth Proportional to 114,612.60, 171,918.90 and 89,729.40

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Solution

The fourth proportional to 114,612.60, 171,918.90 and 89,729.40 is: 134,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,612.60 : 171,918.90 = 89,729.40 : x
  2. Step 2: Convert to fraction form
    114,612.60/171,918.90 = 89,729.40/x
  3. Step 3: Cross multiply
    114,612.60x = 171,918.90 × 89,729.40
  4. Step 4: Simplify right side
    114,612.60x = 15,426,179,745.66
  5. Step 5: Solve for x
    x = 15,426,179,745.66/114,612.60
  6. Step 6: Final answer
    x = 134,594.10

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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.