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Finding the Fourth Proportional to 139,726.78, 192,816.14 and 79,303.02

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Solution

The fourth proportional to 139,726.78, 192,816.14 and 79,303.02 is: 109,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,726.78 : 192,816.14 = 79,303.02 : x
  2. Step 2: Convert to fraction form
    139,726.78/192,816.14 = 79,303.02/x
  3. Step 3: Cross multiply
    139,726.78x = 192,816.14 × 79,303.02
  4. Step 4: Simplify right side
    139,726.78x = 15,290,902,206.74
  5. Step 5: Solve for x
    x = 15,290,902,206.74/139,726.78
  6. Step 6: Final answer
    x = 109,434.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.