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Finding the Fourth Proportional to 66,016.96, 98,985.90 and 21,018.88

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Solution

The fourth proportional to 66,016.96, 98,985.90 and 21,018.88 is: 31,515.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,016.96 : 98,985.90 = 21,018.88 : x
  2. Step 2: Convert to fraction form
    66,016.96/98,985.90 = 21,018.88/x
  3. Step 3: Cross multiply
    66,016.96x = 98,985.90 × 21,018.88
  4. Step 4: Simplify right side
    66,016.96x = 2,080,572,753.79
  5. Step 5: Solve for x
    x = 2,080,572,753.79/66,016.96
  6. Step 6: Final answer
    x = 31,515.73

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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.