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Finding the Fourth Proportional to 65,776.85, 98,666.49 and 21,403.43

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Solution

The fourth proportional to 65,776.85, 98,666.49 and 21,403.43 is: 32,105.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,776.85 : 98,666.49 = 21,403.43 : x
  2. Step 2: Convert to fraction form
    65,776.85/98,666.49 = 21,403.43/x
  3. Step 3: Cross multiply
    65,776.85x = 98,666.49 × 21,403.43
  4. Step 4: Simplify right side
    65,776.85x = 2,111,801,312.06
  5. Step 5: Solve for x
    x = 2,111,801,312.06/65,776.85
  6. Step 6: Final answer
    x = 32,105.54

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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.