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Finding the Fourth Proportional to 100,892.54, 139,298.67 and 62,709.05

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Solution

The fourth proportional to 100,892.54, 139,298.67 and 62,709.05 is: 86,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,892.54 : 139,298.67 = 62,709.05 : x
  2. Step 2: Convert to fraction form
    100,892.54/139,298.67 = 62,709.05/x
  3. Step 3: Cross multiply
    100,892.54x = 139,298.67 × 62,709.05
  4. Step 4: Simplify right side
    100,892.54x = 8,735,287,610.21
  5. Step 5: Solve for x
    x = 8,735,287,610.21/100,892.54
  6. Step 6: Final answer
    x = 86,580.11

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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.