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Finding the Fourth Proportional to 139,434.75, 209,184.93 and 45,940.50

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Solution

The fourth proportional to 139,434.75, 209,184.93 and 45,940.50 is: 68,921.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,434.75 : 209,184.93 = 45,940.50 : x
  2. Step 2: Convert to fraction form
    139,434.75/209,184.93 = 45,940.50/x
  3. Step 3: Cross multiply
    139,434.75x = 209,184.93 × 45,940.50
  4. Step 4: Simplify right side
    139,434.75x = 9,610,060,276.67
  5. Step 5: Solve for x
    x = 9,610,060,276.67/139,434.75
  6. Step 6: Final answer
    x = 68,921.56

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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.