Home / 100,551.51-138,755.67-57,531.84

Finding the Fourth Proportional to 100,551.51, 138,755.67 and 57,531.84

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Solution

The fourth proportional to 100,551.51, 138,755.67 and 57,531.84 is: 79,390.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,551.51 : 138,755.67 = 57,531.84 : x
  2. Step 2: Convert to fraction form
    100,551.51/138,755.67 = 57,531.84/x
  3. Step 3: Cross multiply
    100,551.51x = 138,755.67 × 57,531.84
  4. Step 4: Simplify right side
    100,551.51x = 7,982,869,005.53
  5. Step 5: Solve for x
    x = 7,982,869,005.53/100,551.51
  6. Step 6: Final answer
    x = 79,390.84

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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.