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Finding the Fourth Proportional to 91,203.66, 125,863.16 and 57,213.57

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Solution

The fourth proportional to 91,203.66, 125,863.16 and 57,213.57 is: 78,956.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,203.66 : 125,863.16 = 57,213.57 : x
  2. Step 2: Convert to fraction form
    91,203.66/125,863.16 = 57,213.57/x
  3. Step 3: Cross multiply
    91,203.66x = 125,863.16 × 57,213.57
  4. Step 4: Simplify right side
    91,203.66x = 7,201,080,715.08
  5. Step 5: Solve for x
    x = 7,201,080,715.08/91,203.66
  6. Step 6: Final answer
    x = 78,956.05

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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.