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Finding the Fourth Proportional to 81,297.30, 121,646.61 and 49,161.77

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Solution

The fourth proportional to 81,297.30, 121,646.61 and 49,161.77 is: 73,561.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,297.30 : 121,646.61 = 49,161.77 : x
  2. Step 2: Convert to fraction form
    81,297.30/121,646.61 = 49,161.77/x
  3. Step 3: Cross multiply
    81,297.30x = 121,646.61 × 49,161.77
  4. Step 4: Simplify right side
    81,297.30x = 5,980,362,510.04
  5. Step 5: Solve for x
    x = 5,980,362,510.04/81,297.30
  6. Step 6: Final answer
    x = 73,561.63

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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.