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Finding the Fourth Proportional to 100,955.15, 139,318.31 and 60,669.53

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Solution

The fourth proportional to 100,955.15, 139,318.31 and 60,669.53 is: 83,724.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,955.15 : 139,318.31 = 60,669.53 : x
  2. Step 2: Convert to fraction form
    100,955.15/139,318.31 = 60,669.53/x
  3. Step 3: Cross multiply
    100,955.15x = 139,318.31 × 60,669.53
  4. Step 4: Simplify right side
    100,955.15x = 8,452,376,084.75
  5. Step 5: Solve for x
    x = 8,452,376,084.75/100,955.15
  6. Step 6: Final answer
    x = 83,724.07

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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.