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Finding the Fourth Proportional to 124,664.40, 186,996.60 and 72,046.80

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Solution

The fourth proportional to 124,664.40, 186,996.60 and 72,046.80 is: 108,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,664.40 : 186,996.60 = 72,046.80 : x
  2. Step 2: Convert to fraction form
    124,664.40/186,996.60 = 72,046.80/x
  3. Step 3: Cross multiply
    124,664.40x = 186,996.60 × 72,046.80
  4. Step 4: Simplify right side
    124,664.40x = 13,472,506,640.88
  5. Step 5: Solve for x
    x = 13,472,506,640.88/124,664.40
  6. Step 6: Final answer
    x = 108,070.20

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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.