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Finding the Fourth Proportional to 161,868.87, 242,873.28 and 86,901.48

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Solution

The fourth proportional to 161,868.87, 242,873.28 and 86,901.48 is: 130,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,868.87 : 242,873.28 = 86,901.48 : x
  2. Step 2: Convert to fraction form
    161,868.87/242,873.28 = 86,901.48/x
  3. Step 3: Cross multiply
    161,868.87x = 242,873.28 × 86,901.48
  4. Step 4: Simplify right side
    161,868.87x = 21,106,047,484.45
  5. Step 5: Solve for x
    x = 21,106,047,484.45/161,868.87
  6. Step 6: Final answer
    x = 130,389.79

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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.