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Finding the Fourth Proportional to 176,121.78, 243,048.03 and 100,671.90

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Solution

The fourth proportional to 176,121.78, 243,048.03 and 100,671.90 is: 138,927.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    176,121.78 : 243,048.03 = 100,671.90 : x
  2. Step 2: Convert to fraction form
    176,121.78/243,048.03 = 100,671.90/x
  3. Step 3: Cross multiply
    176,121.78x = 243,048.03 × 100,671.90
  4. Step 4: Simplify right side
    176,121.78x = 24,468,106,971.36
  5. Step 5: Solve for x
    x = 24,468,106,971.36/176,121.78
  6. Step 6: Final answer
    x = 138,927.21

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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.