Home / 66,639.66-99,987.12-29,180.40

Finding the Fourth Proportional to 66,639.66, 99,987.12 and 29,180.40

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Solution

The fourth proportional to 66,639.66, 99,987.12 and 29,180.40 is: 43,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.66 : 99,987.12 = 29,180.40 : x
  2. Step 2: Convert to fraction form
    66,639.66/99,987.12 = 29,180.40/x
  3. Step 3: Cross multiply
    66,639.66x = 99,987.12 × 29,180.40
  4. Step 4: Simplify right side
    66,639.66x = 2,917,664,156.45
  5. Step 5: Solve for x
    x = 2,917,664,156.45/66,639.66
  6. Step 6: Final answer
    x = 43,782.70

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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.