Home / 81,151.70-121,727.55-53,158.10

Finding the Fourth Proportional to 81,151.70, 121,727.55 and 53,158.10

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Solution

The fourth proportional to 81,151.70, 121,727.55 and 53,158.10 is: 79,737.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,151.70 : 121,727.55 = 53,158.10 : x
  2. Step 2: Convert to fraction form
    81,151.70/121,727.55 = 53,158.10/x
  3. Step 3: Cross multiply
    81,151.70x = 121,727.55 × 53,158.10
  4. Step 4: Simplify right side
    81,151.70x = 6,470,805,275.66
  5. Step 5: Solve for x
    x = 6,470,805,275.66/81,151.70
  6. Step 6: Final answer
    x = 79,737.15

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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.