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Finding the Fourth Proportional to 125,715.40, 188,573.10 and 111,937.30

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Solution

The fourth proportional to 125,715.40, 188,573.10 and 111,937.30 is: 167,905.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,715.40 : 188,573.10 = 111,937.30 : x
  2. Step 2: Convert to fraction form
    125,715.40/188,573.10 = 111,937.30/x
  3. Step 3: Cross multiply
    125,715.40x = 188,573.10 × 111,937.30
  4. Step 4: Simplify right side
    125,715.40x = 21,108,363,666.63
  5. Step 5: Solve for x
    x = 21,108,363,666.63/125,715.40
  6. Step 6: Final answer
    x = 167,905.95

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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.