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Finding the Fourth Proportional to 161,871.70, 242,877.60 and 86,904.40

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Solution

The fourth proportional to 161,871.70, 242,877.60 and 86,904.40 is: 130,394.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,871.70 : 242,877.60 = 86,904.40 : x
  2. Step 2: Convert to fraction form
    161,871.70/242,877.60 = 86,904.40/x
  3. Step 3: Cross multiply
    161,871.70x = 242,877.60 × 86,904.40
  4. Step 4: Simplify right side
    161,871.70x = 21,107,132,101.44
  5. Step 5: Solve for x
    x = 21,107,132,101.44/161,871.70
  6. Step 6: Final answer
    x = 130,394.21

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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.