Home / 155,071.29-213,972.75-91,421.37

Finding the Fourth Proportional to 155,071.29, 213,972.75 and 91,421.37

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Solution

The fourth proportional to 155,071.29, 213,972.75 and 91,421.37 is: 126,146.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,071.29 : 213,972.75 = 91,421.37 : x
  2. Step 2: Convert to fraction form
    155,071.29/213,972.75 = 91,421.37/x
  3. Step 3: Cross multiply
    155,071.29x = 213,972.75 × 91,421.37
  4. Step 4: Simplify right side
    155,071.29x = 19,561,681,947.67
  5. Step 5: Solve for x
    x = 19,561,681,947.67/155,071.29
  6. Step 6: Final answer
    x = 126,146.38

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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.