Home / 105,531.76-145,634.07-57,134.20

Finding the Fourth Proportional to 105,531.76, 145,634.07 and 57,134.20

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Solution

The fourth proportional to 105,531.76, 145,634.07 and 57,134.20 is: 78,845.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,531.76 : 145,634.07 = 57,134.20 : x
  2. Step 2: Convert to fraction form
    105,531.76/145,634.07 = 57,134.20/x
  3. Step 3: Cross multiply
    105,531.76x = 145,634.07 × 57,134.20
  4. Step 4: Simplify right side
    105,531.76x = 8,320,686,157.11
  5. Step 5: Solve for x
    x = 8,320,686,157.11/105,531.76
  6. Step 6: Final answer
    x = 78,845.32

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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.