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Finding the Fourth Proportional to 137,393.45, 206,119.56 and 42,621.57

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Solution

The fourth proportional to 137,393.45, 206,119.56 and 42,621.57 is: 63,941.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,393.45 : 206,119.56 = 42,621.57 : x
  2. Step 2: Convert to fraction form
    137,393.45/206,119.56 = 42,621.57/x
  3. Step 3: Cross multiply
    137,393.45x = 206,119.56 × 42,621.57
  4. Step 4: Simplify right side
    137,393.45x = 8,785,139,254.91
  5. Step 5: Solve for x
    x = 8,785,139,254.91/137,393.45
  6. Step 6: Final answer
    x = 63,941.47

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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.