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Finding the Fourth Proportional to 139,360.78, 192,397.68 and 91,752.54

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Solution

The fourth proportional to 139,360.78, 192,397.68 and 91,752.54 is: 126,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,360.78 : 192,397.68 = 91,752.54 : x
  2. Step 2: Convert to fraction form
    139,360.78/192,397.68 = 91,752.54/x
  3. Step 3: Cross multiply
    139,360.78x = 192,397.68 × 91,752.54
  4. Step 4: Simplify right side
    139,360.78x = 17,652,975,830.11
  5. Step 5: Solve for x
    x = 17,652,975,830.11/139,360.78
  6. Step 6: Final answer
    x = 126,671.05

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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.