Home / 287,186.54-431,045.78-145,131.75

Finding the Fourth Proportional to 287,186.54, 431,045.78 and 145,131.75

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Solution

The fourth proportional to 287,186.54, 431,045.78 and 145,131.75 is: 217,832.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,186.54 : 431,045.78 = 145,131.75 : x
  2. Step 2: Convert to fraction form
    287,186.54/431,045.78 = 145,131.75/x
  3. Step 3: Cross multiply
    287,186.54x = 431,045.78 × 145,131.75
  4. Step 4: Simplify right side
    287,186.54x = 62,558,427,655.86
  5. Step 5: Solve for x
    x = 62,558,427,655.86/287,186.54
  6. Step 6: Final answer
    x = 217,832.04

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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.