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Finding the Fourth Proportional to 100,996.40, 139,463.16 and 63,335.60

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Solution

The fourth proportional to 100,996.40, 139,463.16 and 63,335.60 is: 87,458.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,996.40 : 139,463.16 = 63,335.60 : x
  2. Step 2: Convert to fraction form
    100,996.40/139,463.16 = 63,335.60/x
  3. Step 3: Cross multiply
    100,996.40x = 139,463.16 × 63,335.60
  4. Step 4: Simplify right side
    100,996.40x = 8,832,982,916.50
  5. Step 5: Solve for x
    x = 8,832,982,916.50/100,996.40
  6. Step 6: Final answer
    x = 87,458.39

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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.