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Finding the Fourth Proportional to 101,388.28, 139,849.96 and 65,032.20

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Solution

The fourth proportional to 101,388.28, 139,849.96 and 65,032.20 is: 89,702.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,388.28 : 139,849.96 = 65,032.20 : x
  2. Step 2: Convert to fraction form
    101,388.28/139,849.96 = 65,032.20/x
  3. Step 3: Cross multiply
    101,388.28x = 139,849.96 × 65,032.20
  4. Step 4: Simplify right side
    101,388.28x = 9,094,750,568.71
  5. Step 5: Solve for x
    x = 9,094,750,568.71/101,388.28
  6. Step 6: Final answer
    x = 89,702.19

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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.