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Finding the Fourth Proportional to 129,871.65, 194,807.48 and 121,998.45

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Solution

The fourth proportional to 129,871.65, 194,807.48 and 121,998.45 is: 182,997.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,871.65 : 194,807.48 = 121,998.45 : x
  2. Step 2: Convert to fraction form
    129,871.65/194,807.48 = 121,998.45/x
  3. Step 3: Cross multiply
    129,871.65x = 194,807.48 × 121,998.45
  4. Step 4: Simplify right side
    129,871.65x = 23,766,209,998.41
  5. Step 5: Solve for x
    x = 23,766,209,998.41/129,871.65
  6. Step 6: Final answer
    x = 182,997.68

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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.