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Finding the Fourth Proportional to 253,797.15, 380,681.70 and 85,300.08

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Solution

The fourth proportional to 253,797.15, 380,681.70 and 85,300.08 is: 127,945.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,797.15 : 380,681.70 = 85,300.08 : x
  2. Step 2: Convert to fraction form
    253,797.15/380,681.70 = 85,300.08/x
  3. Step 3: Cross multiply
    253,797.15x = 380,681.70 × 85,300.08
  4. Step 4: Simplify right side
    253,797.15x = 32,472,179,464.54
  5. Step 5: Solve for x
    x = 32,472,179,464.54/253,797.15
  6. Step 6: Final answer
    x = 127,945.41

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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.