Home / 105,551.40-145,661.15-57,153.38

Finding the Fourth Proportional to 105,551.40, 145,661.15 and 57,153.38

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Solution

The fourth proportional to 105,551.40, 145,661.15 and 57,153.38 is: 78,871.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,551.40 : 145,661.15 = 57,153.38 : x
  2. Step 2: Convert to fraction form
    105,551.40/145,661.15 = 57,153.38/x
  3. Step 3: Cross multiply
    105,551.40x = 145,661.15 × 57,153.38
  4. Step 4: Simplify right side
    105,551.40x = 8,325,027,057.19
  5. Step 5: Solve for x
    x = 8,325,027,057.19/105,551.40
  6. Step 6: Final answer
    x = 78,871.78

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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.