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Finding the Fourth Proportional to 66,415.60, 99,331.80 and 50,669.20

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Solution

The fourth proportional to 66,415.60, 99,331.80 and 50,669.20 is: 75,781.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415.60 : 99,331.80 = 50,669.20 : x
  2. Step 2: Convert to fraction form
    66,415.60/99,331.80 = 50,669.20/x
  3. Step 3: Cross multiply
    66,415.60x = 99,331.80 × 50,669.20
  4. Step 4: Simplify right side
    66,415.60x = 5,033,062,840.56
  5. Step 5: Solve for x
    x = 5,033,062,840.56/66,415.60
  6. Step 6: Final answer
    x = 75,781.34

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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.