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Finding the Fourth Proportional to 65,388.48, 90,236.16 and 35,580.48

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Solution

The fourth proportional to 65,388.48, 90,236.16 and 35,580.48 is: 49,101.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,388.48 : 90,236.16 = 35,580.48 : x
  2. Step 2: Convert to fraction form
    65,388.48/90,236.16 = 35,580.48/x
  3. Step 3: Cross multiply
    65,388.48x = 90,236.16 × 35,580.48
  4. Step 4: Simplify right side
    65,388.48x = 3,210,645,886.16
  5. Step 5: Solve for x
    x = 3,210,645,886.16/65,388.48
  6. Step 6: Final answer
    x = 49,101.09

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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.