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Finding the Fourth Proportional to 76,065.60, 113,998.80 and 40,929.60

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Solution

The fourth proportional to 76,065.60, 113,998.80 and 40,929.60 is: 61,340.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,065.60 : 113,998.80 = 40,929.60 : x
  2. Step 2: Convert to fraction form
    76,065.60/113,998.80 = 40,929.60/x
  3. Step 3: Cross multiply
    76,065.60x = 113,998.80 × 40,929.60
  4. Step 4: Simplify right side
    76,065.60x = 4,665,925,284.48
  5. Step 5: Solve for x
    x = 4,665,925,284.48/76,065.60
  6. Step 6: Final answer
    x = 61,340.81

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1.5x scale

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.