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Finding the Fourth Proportional to 121,115.40, 181,737.90 and 51,001.80

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Solution

The fourth proportional to 121,115.40, 181,737.90 and 51,001.80 is: 76,529.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,115.40 : 181,737.90 = 51,001.80 : x
  2. Step 2: Convert to fraction form
    121,115.40/181,737.90 = 51,001.80/x
  3. Step 3: Cross multiply
    121,115.40x = 181,737.90 × 51,001.80
  4. Step 4: Simplify right side
    121,115.40x = 9,268,960,028.22
  5. Step 5: Solve for x
    x = 9,268,960,028.22/121,115.40
  6. Step 6: Final answer
    x = 76,529.99

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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.