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Finding the Fourth Proportional to 66,216.30, 99,325.53 and 19,473.90

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Solution

The fourth proportional to 66,216.30, 99,325.53 and 19,473.90 is: 29,211.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,216.30 : 99,325.53 = 19,473.90 : x
  2. Step 2: Convert to fraction form
    66,216.30/99,325.53 = 19,473.90/x
  3. Step 3: Cross multiply
    66,216.30x = 99,325.53 × 19,473.90
  4. Step 4: Simplify right side
    66,216.30x = 1,934,255,438.67
  5. Step 5: Solve for x
    x = 1,934,255,438.67/66,216.30
  6. Step 6: Final answer
    x = 29,211.17

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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.