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Finding the Fourth Proportional to 72,467.40, 99,981.10 and 43,776.32

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Solution

The fourth proportional to 72,467.40, 99,981.10 and 43,776.32 is: 60,396.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,467.40 : 99,981.10 = 43,776.32 : x
  2. Step 2: Convert to fraction form
    72,467.40/99,981.10 = 43,776.32/x
  3. Step 3: Cross multiply
    72,467.40x = 99,981.10 × 43,776.32
  4. Step 4: Simplify right side
    72,467.40x = 4,376,804,627.55
  5. Step 5: Solve for x
    x = 4,376,804,627.55/72,467.40
  6. Step 6: Final answer
    x = 60,396.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.