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Finding the Fourth Proportional to 125,588.30, 188,090.85 and 85,930.70

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Solution

The fourth proportional to 125,588.30, 188,090.85 and 85,930.70 is: 128,696.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,588.30 : 188,090.85 = 85,930.70 : x
  2. Step 2: Convert to fraction form
    125,588.30/188,090.85 = 85,930.70/x
  3. Step 3: Cross multiply
    125,588.30x = 188,090.85 × 85,930.70
  4. Step 4: Simplify right side
    125,588.30x = 16,162,778,404.10
  5. Step 5: Solve for x
    x = 16,162,778,404.10/125,588.30
  6. Step 6: Final answer
    x = 128,696.53

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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.