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Finding the Fourth Proportional to 159,528, 220,147.69 and 86,930.76

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Solution

The fourth proportional to 159,528, 220,147.69 and 86,930.76 is: 119,963.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,528 : 220,147.69 = 86,930.76 : x
  2. Step 2: Convert to fraction form
    159,528/220,147.69 = 86,930.76/x
  3. Step 3: Cross multiply
    159,528x = 220,147.69 × 86,930.76
  4. Step 4: Simplify right side
    159,528x = 19,137,606,003.94
  5. Step 5: Solve for x
    x = 19,137,606,003.94/159,528
  6. Step 6: Final answer
    x = 119,963.93

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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.