Home / 287,509.19-431,327.25-87,845.18

Finding the Fourth Proportional to 287,509.19, 431,327.25 and 87,845.18

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Solution

The fourth proportional to 287,509.19, 431,327.25 and 87,845.18 is: 131,787.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,509.19 : 431,327.25 = 87,845.18 : x
  2. Step 2: Convert to fraction form
    287,509.19/431,327.25 = 87,845.18/x
  3. Step 3: Cross multiply
    287,509.19x = 431,327.25 × 87,845.18
  4. Step 4: Simplify right side
    287,509.19x = 37,890,017,758.52
  5. Step 5: Solve for x
    x = 37,890,017,758.52/287,509.19
  6. Step 6: Final answer
    x = 131,787.16

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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.