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Finding the Fourth Proportional to 131,008.32, 180,796.32 and 74,429.28

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Solution

The fourth proportional to 131,008.32, 180,796.32 and 74,429.28 is: 102,715.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,008.32 : 180,796.32 = 74,429.28 : x
  2. Step 2: Convert to fraction form
    131,008.32/180,796.32 = 74,429.28/x
  3. Step 3: Cross multiply
    131,008.32x = 180,796.32 × 74,429.28
  4. Step 4: Simplify right side
    131,008.32x = 13,456,539,924.25
  5. Step 5: Solve for x
    x = 13,456,539,924.25/131,008.32
  6. Step 6: Final answer
    x = 102,715.16

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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.