Home / 287,787.20-431,434.66-110,421.50

Finding the Fourth Proportional to 287,787.20, 431,434.66 and 110,421.50

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Solution

The fourth proportional to 287,787.20, 431,434.66 and 110,421.50 is: 165,537.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,787.20 : 431,434.66 = 110,421.50 : x
  2. Step 2: Convert to fraction form
    287,787.20/431,434.66 = 110,421.50/x
  3. Step 3: Cross multiply
    287,787.20x = 431,434.66 × 110,421.50
  4. Step 4: Simplify right side
    287,787.20x = 47,639,662,309.19
  5. Step 5: Solve for x
    x = 47,639,662,309.19/287,787.20
  6. Step 6: Final answer
    x = 165,537.81

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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.