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Finding the Fourth Proportional to 131,617, 181,632.18 and 72,001

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Solution

The fourth proportional to 131,617, 181,632.18 and 72,001 is: 99,361.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,617 : 181,632.18 = 72,001 : x
  2. Step 2: Convert to fraction form
    131,617/181,632.18 = 72,001/x
  3. Step 3: Cross multiply
    131,617x = 181,632.18 × 72,001
  4. Step 4: Simplify right side
    131,617x = 13,077,698,592.18
  5. Step 5: Solve for x
    x = 13,077,698,592.18/131,617
  6. Step 6: Final answer
    x = 99,361.77

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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.