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Finding the Fourth Proportional to 125,431.15, 188,144.88 and 86,927.19

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Solution

The fourth proportional to 125,431.15, 188,144.88 and 86,927.19 is: 130,389.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,431.15 : 188,144.88 = 86,927.19 : x
  2. Step 2: Convert to fraction form
    125,431.15/188,144.88 = 86,927.19/x
  3. Step 3: Cross multiply
    125,431.15x = 188,144.88 × 86,927.19
  4. Step 4: Simplify right side
    125,431.15x = 16,354,905,758.08
  5. Step 5: Solve for x
    x = 16,354,905,758.08/125,431.15
  6. Step 6: Final answer
    x = 130,389.51

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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.