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Finding the Fourth Proportional to 117,115.40, 161,619.30 and 63,400.42

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Solution

The fourth proportional to 117,115.40, 161,619.30 and 63,400.42 is: 87,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,115.40 : 161,619.30 = 63,400.42 : x
  2. Step 2: Convert to fraction form
    117,115.40/161,619.30 = 63,400.42/x
  3. Step 3: Cross multiply
    117,115.40x = 161,619.30 × 63,400.42
  4. Step 4: Simplify right side
    117,115.40x = 10,246,730,850.51
  5. Step 5: Solve for x
    x = 10,246,730,850.51/117,115.40
  6. Step 6: Final answer
    x = 87,492.60

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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.