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Finding the Fourth Proportional to 66,225.60, 91,389.44 and 36,009.60

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Solution

The fourth proportional to 66,225.60, 91,389.44 and 36,009.60 is: 49,692.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,225.60 : 91,389.44 = 36,009.60 : x
  2. Step 2: Convert to fraction form
    66,225.60/91,389.44 = 36,009.60/x
  3. Step 3: Cross multiply
    66,225.60x = 91,389.44 × 36,009.60
  4. Step 4: Simplify right side
    66,225.60x = 3,290,897,178.62
  5. Step 5: Solve for x
    x = 3,290,897,178.62/66,225.60
  6. Step 6: Final answer
    x = 49,692.22

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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.