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Finding the Fourth Proportional to 75,340.80, 104,025.60 and 66,009.60

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Solution

The fourth proportional to 75,340.80, 104,025.60 and 66,009.60 is: 91,141.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,340.80 : 104,025.60 = 66,009.60 : x
  2. Step 2: Convert to fraction form
    75,340.80/104,025.60 = 66,009.60/x
  3. Step 3: Cross multiply
    75,340.80x = 104,025.60 × 66,009.60
  4. Step 4: Simplify right side
    75,340.80x = 6,866,688,245.76
  5. Step 5: Solve for x
    x = 6,866,688,245.76/75,340.80
  6. Step 6: Final answer
    x = 91,141.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.