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Finding the Fourth Proportional to 174,663.20, 261,994.80 and 139,671.20

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Solution

The fourth proportional to 174,663.20, 261,994.80 and 139,671.20 is: 209,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,663.20 : 261,994.80 = 139,671.20 : x
  2. Step 2: Convert to fraction form
    174,663.20/261,994.80 = 139,671.20/x
  3. Step 3: Cross multiply
    174,663.20x = 261,994.80 × 139,671.20
  4. Step 4: Simplify right side
    174,663.20x = 36,593,128,109.76
  5. Step 5: Solve for x
    x = 36,593,128,109.76/174,663.20
  6. Step 6: Final answer
    x = 209,506.80

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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.