Home / 65,720.78-98,555.58-21,336.80

Finding the Fourth Proportional to 65,720.78, 98,555.58 and 21,336.80

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Solution

The fourth proportional to 65,720.78, 98,555.58 and 21,336.80 is: 31,996.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.78 : 98,555.58 = 21,336.80 : x
  2. Step 2: Convert to fraction form
    65,720.78/98,555.58 = 21,336.80/x
  3. Step 3: Cross multiply
    65,720.78x = 98,555.58 × 21,336.80
  4. Step 4: Simplify right side
    65,720.78x = 2,102,860,699.34
  5. Step 5: Solve for x
    x = 2,102,860,699.34/65,720.78
  6. Step 6: Final answer
    x = 31,996.89

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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.