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Finding the Fourth Proportional to 124,081.80, 186,122.70 and 76,842.60

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Solution

The fourth proportional to 124,081.80, 186,122.70 and 76,842.60 is: 115,263.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,081.80 : 186,122.70 = 76,842.60 : x
  2. Step 2: Convert to fraction form
    124,081.80/186,122.70 = 76,842.60/x
  3. Step 3: Cross multiply
    124,081.80x = 186,122.70 × 76,842.60
  4. Step 4: Simplify right side
    124,081.80x = 14,302,152,187.02
  5. Step 5: Solve for x
    x = 14,302,152,187.02/124,081.80
  6. Step 6: Final answer
    x = 115,263.90

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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.