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Finding the Fourth Proportional to 125,912.70, 188,869.05 and 42,806.70

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Solution

The fourth proportional to 125,912.70, 188,869.05 and 42,806.70 is: 64,210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,912.70 : 188,869.05 = 42,806.70 : x
  2. Step 2: Convert to fraction form
    125,912.70/188,869.05 = 42,806.70/x
  3. Step 3: Cross multiply
    125,912.70x = 188,869.05 × 42,806.70
  4. Step 4: Simplify right side
    125,912.70x = 8,084,860,762.64
  5. Step 5: Solve for x
    x = 8,084,860,762.64/125,912.70
  6. Step 6: Final answer
    x = 64,210.05

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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.