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Finding the Fourth Proportional to 65,999.60, 98,999.40 and 21,615.65

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Solution

The fourth proportional to 65,999.60, 98,999.40 and 21,615.65 is: 32,423.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,999.60 : 98,999.40 = 21,615.65 : x
  2. Step 2: Convert to fraction form
    65,999.60/98,999.40 = 21,615.65/x
  3. Step 3: Cross multiply
    65,999.60x = 98,999.40 × 21,615.65
  4. Step 4: Simplify right side
    65,999.60x = 2,139,936,380.61
  5. Step 5: Solve for x
    x = 2,139,936,380.61/65,999.60
  6. Step 6: Final answer
    x = 32,423.48

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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.