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Finding the Fourth Proportional to 139,727.79, 210,533.13 and 115,314.66

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Solution

The fourth proportional to 139,727.79, 210,533.13 and 115,314.66 is: 173,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,727.79 : 210,533.13 = 115,314.66 : x
  2. Step 2: Convert to fraction form
    139,727.79/210,533.13 = 115,314.66/x
  3. Step 3: Cross multiply
    139,727.79x = 210,533.13 × 115,314.66
  4. Step 4: Simplify right side
    139,727.79x = 24,277,556,304.69
  5. Step 5: Solve for x
    x = 24,277,556,304.69/139,727.79
  6. Step 6: Final answer
    x = 173,748.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.