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Finding the Fourth Proportional to 125,595.80, 188,102.10 and 85,938.20

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Solution

The fourth proportional to 125,595.80, 188,102.10 and 85,938.20 is: 128,707.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,595.80 : 188,102.10 = 85,938.20 : x
  2. Step 2: Convert to fraction form
    125,595.80/188,102.10 = 85,938.20/x
  3. Step 3: Cross multiply
    125,595.80x = 188,102.10 × 85,938.20
  4. Step 4: Simplify right side
    125,595.80x = 16,165,155,890.22
  5. Step 5: Solve for x
    x = 16,165,155,890.22/125,595.80
  6. Step 6: Final answer
    x = 128,707.77

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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.