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Finding the Fourth Proportional to 139,271.49, 208,445.13 and 126,820.17

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Solution

The fourth proportional to 139,271.49, 208,445.13 and 126,820.17 is: 189,809.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,271.49 : 208,445.13 = 126,820.17 : x
  2. Step 2: Convert to fraction form
    139,271.49/208,445.13 = 126,820.17/x
  3. Step 3: Cross multiply
    139,271.49x = 208,445.13 × 126,820.17
  4. Step 4: Simplify right side
    139,271.49x = 26,435,046,822.27
  5. Step 5: Solve for x
    x = 26,435,046,822.27/139,271.49
  6. Step 6: Final answer
    x = 189,809.46

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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.