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Finding the Fourth Proportional to 125,902.90, 189,000.15 and 76,039.30

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Solution

The fourth proportional to 125,902.90, 189,000.15 and 76,039.30 is: 114,147.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,902.90 : 189,000.15 = 76,039.30 : x
  2. Step 2: Convert to fraction form
    125,902.90/189,000.15 = 76,039.30/x
  3. Step 3: Cross multiply
    125,902.90x = 189,000.15 × 76,039.30
  4. Step 4: Simplify right side
    125,902.90x = 14,371,439,105.90
  5. Step 5: Solve for x
    x = 14,371,439,105.90/125,902.90
  6. Step 6: Final answer
    x = 114,147.01

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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.