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Finding the Fourth Proportional to 161,866.70, 242,870.10 and 86,899.38

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Solution

The fourth proportional to 161,866.70, 242,870.10 and 86,899.38 is: 130,386.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,866.70 : 242,870.10 = 86,899.38 : x
  2. Step 2: Convert to fraction form
    161,866.70/242,870.10 = 86,899.38/x
  3. Step 3: Cross multiply
    161,866.70x = 242,870.10 × 86,899.38
  4. Step 4: Simplify right side
    161,866.70x = 21,105,261,110.54
  5. Step 5: Solve for x
    x = 21,105,261,110.54/161,866.70
  6. Step 6: Final answer
    x = 130,386.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.