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Finding the Fourth Proportional to 76,685.60, 114,920.40 and 60,917.60

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Solution

The fourth proportional to 76,685.60, 114,920.40 and 60,917.60 is: 91,290.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,685.60 : 114,920.40 = 60,917.60 : x
  2. Step 2: Convert to fraction form
    76,685.60/114,920.40 = 60,917.60/x
  3. Step 3: Cross multiply
    76,685.60x = 114,920.40 × 60,917.60
  4. Step 4: Simplify right side
    76,685.60x = 7,000,674,959.04
  5. Step 5: Solve for x
    x = 7,000,674,959.04/76,685.60
  6. Step 6: Final answer
    x = 91,290.61

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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.