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Finding the Fourth Proportional to 66,439.16, 99,671.58 and 21,472.62

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Solution

The fourth proportional to 66,439.16, 99,671.58 and 21,472.62 is: 32,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,439.16 : 99,671.58 = 21,472.62 : x
  2. Step 2: Convert to fraction form
    66,439.16/99,671.58 = 21,472.62/x
  3. Step 3: Cross multiply
    66,439.16x = 99,671.58 × 21,472.62
  4. Step 4: Simplify right side
    66,439.16x = 2,140,209,962.14
  5. Step 5: Solve for x
    x = 2,140,209,962.14/66,439.16
  6. Step 6: Final answer
    x = 32,213.08

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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.