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Finding the Fourth Proportional to 161,871.40, 242,807.10 and 128,410.30

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Solution

The fourth proportional to 161,871.40, 242,807.10 and 128,410.30 is: 192,615.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,871.40 : 242,807.10 = 128,410.30 : x
  2. Step 2: Convert to fraction form
    161,871.40/242,807.10 = 128,410.30/x
  3. Step 3: Cross multiply
    161,871.40x = 242,807.10 × 128,410.30
  4. Step 4: Simplify right side
    161,871.40x = 31,178,932,553.13
  5. Step 5: Solve for x
    x = 31,178,932,553.13/161,871.40
  6. Step 6: Final answer
    x = 192,615.45

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1.5x scale

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.