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Finding the Fourth Proportional to 117,143.46, 161,658.08 and 63,428.51

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Solution

The fourth proportional to 117,143.46, 161,658.08 and 63,428.51 is: 87,531.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,143.46 : 161,658.08 = 63,428.51 : x
  2. Step 2: Convert to fraction form
    117,143.46/161,658.08 = 63,428.51/x
  3. Step 3: Cross multiply
    117,143.46x = 161,658.08 × 63,428.51
  4. Step 4: Simplify right side
    117,143.46x = 10,253,730,018.43
  5. Step 5: Solve for x
    x = 10,253,730,018.43/117,143.46
  6. Step 6: Final answer
    x = 87,531.39

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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.