Home / 56,619.11-78,135.37-31,126.55

Finding the Fourth Proportional to 56,619.11, 78,135.37 and 31,126.55

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Solution

The fourth proportional to 56,619.11, 78,135.37 and 31,126.55 is: 42,955.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,619.11 : 78,135.37 = 31,126.55 : x
  2. Step 2: Convert to fraction form
    56,619.11/78,135.37 = 31,126.55/x
  3. Step 3: Cross multiply
    56,619.11x = 78,135.37 × 31,126.55
  4. Step 4: Simplify right side
    56,619.11x = 2,432,084,032.58
  5. Step 5: Solve for x
    x = 2,432,084,032.58/56,619.11
  6. Step 6: Final answer
    x = 42,955.18

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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.