Home / 56,390.78-77,815.91-31,238.46

Finding the Fourth Proportional to 56,390.78, 77,815.91 and 31,238.46

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Solution

The fourth proportional to 56,390.78, 77,815.91 and 31,238.46 is: 43,107.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,390.78 : 77,815.91 = 31,238.46 : x
  2. Step 2: Convert to fraction form
    56,390.78/77,815.91 = 31,238.46/x
  3. Step 3: Cross multiply
    56,390.78x = 77,815.91 × 31,238.46
  4. Step 4: Simplify right side
    56,390.78x = 2,430,849,191.90
  5. Step 5: Solve for x
    x = 2,430,849,191.90/56,390.78
  6. Step 6: Final answer
    x = 43,107.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.