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Finding the Fourth Proportional to 66,341.80, 99,383.10 and 39,968.20

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Solution

The fourth proportional to 66,341.80, 99,383.10 and 39,968.20 is: 59,874.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,341.80 : 99,383.10 = 39,968.20 : x
  2. Step 2: Convert to fraction form
    66,341.80/99,383.10 = 39,968.20/x
  3. Step 3: Cross multiply
    66,341.80x = 99,383.10 × 39,968.20
  4. Step 4: Simplify right side
    66,341.80x = 3,972,163,617.42
  5. Step 5: Solve for x
    x = 3,972,163,617.42/66,341.80
  6. Step 6: Final answer
    x = 59,874.22

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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.