Home / 287,113.31-430,637.16-76,767.65

Finding the Fourth Proportional to 287,113.31, 430,637.16 and 76,767.65

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Solution

The fourth proportional to 287,113.31, 430,637.16 and 76,767.65 is: 115,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,113.31 : 430,637.16 = 76,767.65 : x
  2. Step 2: Convert to fraction form
    287,113.31/430,637.16 = 76,767.65/x
  3. Step 3: Cross multiply
    287,113.31x = 430,637.16 × 76,767.65
  4. Step 4: Simplify right side
    287,113.31x = 33,059,002,093.64
  5. Step 5: Solve for x
    x = 33,059,002,093.64/287,113.31
  6. Step 6: Final answer
    x = 115,142.70

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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.