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Finding the Fourth Proportional to 91,039.68, 125,439.84 and 61,179.84

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Solution

The fourth proportional to 91,039.68, 125,439.84 and 61,179.84 is: 84,297.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,039.68 : 125,439.84 = 61,179.84 : x
  2. Step 2: Convert to fraction form
    91,039.68/125,439.84 = 61,179.84/x
  3. Step 3: Cross multiply
    91,039.68x = 125,439.84 × 61,179.84
  4. Step 4: Simplify right side
    91,039.68x = 7,674,389,340.83
  5. Step 5: Solve for x
    x = 7,674,389,340.83/91,039.68
  6. Step 6: Final answer
    x = 84,297.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.