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Finding the Fourth Proportional to 287,458.66, 431,187.99 and 87,768.35

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Solution

The fourth proportional to 287,458.66, 431,187.99 and 87,768.35 is: 131,652.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,458.66 : 431,187.99 = 87,768.35 : x
  2. Step 2: Convert to fraction form
    287,458.66/431,187.99 = 87,768.35/x
  3. Step 3: Cross multiply
    287,458.66x = 431,187.99 × 87,768.35
  4. Step 4: Simplify right side
    287,458.66x = 37,844,658,422.12
  5. Step 5: Solve for x
    x = 37,844,658,422.12/287,458.66
  6. Step 6: Final answer
    x = 131,652.53

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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.