Home / 115,428-159,302.88-67,721.52

Finding the Fourth Proportional to 115,428, 159,302.88 and 67,721.52

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Solution

The fourth proportional to 115,428, 159,302.88 and 67,721.52 is: 93,462.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,428 : 159,302.88 = 67,721.52 : x
  2. Step 2: Convert to fraction form
    115,428/159,302.88 = 67,721.52/x
  3. Step 3: Cross multiply
    115,428x = 159,302.88 × 67,721.52
  4. Step 4: Simplify right side
    115,428x = 10,788,233,173.98
  5. Step 5: Solve for x
    x = 10,788,233,173.98/115,428
  6. Step 6: Final answer
    x = 93,462.88

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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.