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Finding the Fourth Proportional to 161,771.40, 242,657.10 and 91,787.40

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Solution

The fourth proportional to 161,771.40, 242,657.10 and 91,787.40 is: 137,681.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,771.40 : 242,657.10 = 91,787.40 : x
  2. Step 2: Convert to fraction form
    161,771.40/242,657.10 = 91,787.40/x
  3. Step 3: Cross multiply
    161,771.40x = 242,657.10 × 91,787.40
  4. Step 4: Simplify right side
    161,771.40x = 22,272,864,300.54
  5. Step 5: Solve for x
    x = 22,272,864,300.54/161,771.40
  6. Step 6: Final answer
    x = 137,681.10

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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.