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Finding the Fourth Proportional to 117,378.66, 161,982.30 and 63,663.40

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Solution

The fourth proportional to 117,378.66, 161,982.30 and 63,663.40 is: 87,855.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,378.66 : 161,982.30 = 63,663.40 : x
  2. Step 2: Convert to fraction form
    117,378.66/161,982.30 = 63,663.40/x
  3. Step 3: Cross multiply
    117,378.66x = 161,982.30 × 63,663.40
  4. Step 4: Simplify right side
    117,378.66x = 10,312,343,957.82
  5. Step 5: Solve for x
    x = 10,312,343,957.82/117,378.66
  6. Step 6: Final answer
    x = 87,855.36

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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.