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Finding the Fourth Proportional to 66,609.97, 99,964.17 and 31,549.63

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Solution

The fourth proportional to 66,609.97, 99,964.17 and 31,549.63 is: 47,347.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,609.97 : 99,964.17 = 31,549.63 : x
  2. Step 2: Convert to fraction form
    66,609.97/99,964.17 = 31,549.63/x
  3. Step 3: Cross multiply
    66,609.97x = 99,964.17 × 31,549.63
  4. Step 4: Simplify right side
    66,609.97x = 3,153,831,919.19
  5. Step 5: Solve for x
    x = 3,153,831,919.19/66,609.97
  6. Step 6: Final answer
    x = 47,347.75

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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.