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Finding the Fourth Proportional to 287,599.54, 431,400.40 and 87,919.16

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Solution

The fourth proportional to 287,599.54, 431,400.40 and 87,919.16 is: 131,879.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,599.54 : 431,400.40 = 87,919.16 : x
  2. Step 2: Convert to fraction form
    287,599.54/431,400.40 = 87,919.16/x
  3. Step 3: Cross multiply
    287,599.54x = 431,400.40 × 87,919.16
  4. Step 4: Simplify right side
    287,599.54x = 37,928,360,791.66
  5. Step 5: Solve for x
    x = 37,928,360,791.66/287,599.54
  6. Step 6: Final answer
    x = 131,879.07

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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.