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Finding the Fourth Proportional to 125,139.42, 187,669.44 and 40,880.43

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Solution

The fourth proportional to 125,139.42, 187,669.44 and 40,880.43 is: 61,307.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,139.42 : 187,669.44 = 40,880.43 : x
  2. Step 2: Convert to fraction form
    125,139.42/187,669.44 = 40,880.43/x
  3. Step 3: Cross multiply
    125,139.42x = 187,669.44 × 40,880.43
  4. Step 4: Simplify right side
    125,139.42x = 7,672,007,405.06
  5. Step 5: Solve for x
    x = 7,672,007,405.06/125,139.42
  6. Step 6: Final answer
    x = 61,307.68

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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.