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Finding the Fourth Proportional to 65,388.40, 90,220.44 and 37,109.68

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Solution

The fourth proportional to 65,388.40, 90,220.44 and 37,109.68 is: 51,202.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,388.40 : 90,220.44 = 37,109.68 : x
  2. Step 2: Convert to fraction form
    65,388.40/90,220.44 = 37,109.68/x
  3. Step 3: Cross multiply
    65,388.40x = 90,220.44 × 37,109.68
  4. Step 4: Simplify right side
    65,388.40x = 3,348,051,657.86
  5. Step 5: Solve for x
    x = 3,348,051,657.86/65,388.40
  6. Step 6: Final answer
    x = 51,202.53

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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.