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Finding the Fourth Proportional to 124,870.80, 186,917.40 and 72,123.60

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Solution

The fourth proportional to 124,870.80, 186,917.40 and 72,123.60 is: 107,960.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,870.80 : 186,917.40 = 72,123.60 : x
  2. Step 2: Convert to fraction form
    124,870.80/186,917.40 = 72,123.60/x
  3. Step 3: Cross multiply
    124,870.80x = 186,917.40 × 72,123.60
  4. Step 4: Simplify right side
    124,870.80x = 13,481,155,790.64
  5. Step 5: Solve for x
    x = 13,481,155,790.64/124,870.80
  6. Step 6: Final answer
    x = 107,960.83

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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.