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Finding the Fourth Proportional to 124,429.80, 186,644.70 and 118,986.60

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Solution

The fourth proportional to 124,429.80, 186,644.70 and 118,986.60 is: 178,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,429.80 : 186,644.70 = 118,986.60 : x
  2. Step 2: Convert to fraction form
    124,429.80/186,644.70 = 118,986.60/x
  3. Step 3: Cross multiply
    124,429.80x = 186,644.70 × 118,986.60
  4. Step 4: Simplify right side
    124,429.80x = 22,208,218,261.02
  5. Step 5: Solve for x
    x = 22,208,218,261.02/124,429.80
  6. Step 6: Final answer
    x = 178,479.90

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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.