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Finding the Fourth Proportional to 66,492.98, 99,749.40 and 21,499.28

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Solution

The fourth proportional to 66,492.98, 99,749.40 and 21,499.28 is: 32,252.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,492.98 : 99,749.40 = 21,499.28 : x
  2. Step 2: Convert to fraction form
    66,492.98/99,749.40 = 21,499.28/x
  3. Step 3: Cross multiply
    66,492.98x = 99,749.40 × 21,499.28
  4. Step 4: Simplify right side
    66,492.98x = 2,144,540,280.43
  5. Step 5: Solve for x
    x = 2,144,540,280.43/66,492.98
  6. Step 6: Final answer
    x = 32,252.13

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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.