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Finding the Fourth Proportional to 125,209.77, 187,731.61 and 40,940.40

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Solution

The fourth proportional to 125,209.77, 187,731.61 and 40,940.40 is: 61,383.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,209.77 : 187,731.61 = 40,940.40 : x
  2. Step 2: Convert to fraction form
    125,209.77/187,731.61 = 40,940.40/x
  3. Step 3: Cross multiply
    125,209.77x = 187,731.61 × 40,940.40
  4. Step 4: Simplify right side
    125,209.77x = 7,685,807,807.69
  5. Step 5: Solve for x
    x = 7,685,807,807.69/125,209.77
  6. Step 6: Final answer
    x = 61,383.45

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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.