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Finding the Fourth Proportional to 125,314.80, 188,015.40 and 55,244.40

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Solution

The fourth proportional to 125,314.80, 188,015.40 and 55,244.40 is: 82,885.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,314.80 : 188,015.40 = 55,244.40 : x
  2. Step 2: Convert to fraction form
    125,314.80/188,015.40 = 55,244.40/x
  3. Step 3: Cross multiply
    125,314.80x = 188,015.40 × 55,244.40
  4. Step 4: Simplify right side
    125,314.80x = 10,386,797,963.76
  5. Step 5: Solve for x
    x = 10,386,797,963.76/125,314.80
  6. Step 6: Final answer
    x = 82,885.64

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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.