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Finding the Fourth Proportional to 125,989.64, 188,984.72 and 118,291.40

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Solution

The fourth proportional to 125,989.64, 188,984.72 and 118,291.40 is: 177,437.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,989.64 : 188,984.72 = 118,291.40 : x
  2. Step 2: Convert to fraction form
    125,989.64/188,984.72 = 118,291.40/x
  3. Step 3: Cross multiply
    125,989.64x = 188,984.72 × 118,291.40
  4. Step 4: Simplify right side
    125,989.64x = 22,355,267,107.41
  5. Step 5: Solve for x
    x = 22,355,267,107.41/125,989.64
  6. Step 6: Final answer
    x = 177,437.34

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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.