Home / 65,905.80-98,788.91-21,520.64

Finding the Fourth Proportional to 65,905.80, 98,788.91 and 21,520.64

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Solution

The fourth proportional to 65,905.80, 98,788.91 and 21,520.64 is: 32,258.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,905.80 : 98,788.91 = 21,520.64 : x
  2. Step 2: Convert to fraction form
    65,905.80/98,788.91 = 21,520.64/x
  3. Step 3: Cross multiply
    65,905.80x = 98,788.91 × 21,520.64
  4. Step 4: Simplify right side
    65,905.80x = 2,125,999,966.55
  5. Step 5: Solve for x
    x = 2,125,999,966.55/65,905.80
  6. Step 6: Final answer
    x = 32,258.16

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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.