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Finding the Fourth Proportional to 161,871.40, 242,807.10 and 91,887.40

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Solution

The fourth proportional to 161,871.40, 242,807.10 and 91,887.40 is: 137,831.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,871.40 : 242,807.10 = 91,887.40 : x
  2. Step 2: Convert to fraction form
    161,871.40/242,807.10 = 91,887.40/x
  3. Step 3: Cross multiply
    161,871.40x = 242,807.10 × 91,887.40
  4. Step 4: Simplify right side
    161,871.40x = 22,310,913,120.54
  5. Step 5: Solve for x
    x = 22,310,913,120.54/161,871.40
  6. Step 6: Final answer
    x = 137,831.10

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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.