Home / 56,731.32-78,291.12-31,239.60

Finding the Fourth Proportional to 56,731.32, 78,291.12 and 31,239.60

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Solution

The fourth proportional to 56,731.32, 78,291.12 and 31,239.60 is: 43,111.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,731.32 : 78,291.12 = 31,239.60 : x
  2. Step 2: Convert to fraction form
    56,731.32/78,291.12 = 31,239.60/x
  3. Step 3: Cross multiply
    56,731.32x = 78,291.12 × 31,239.60
  4. Step 4: Simplify right side
    56,731.32x = 2,445,783,272.35
  5. Step 5: Solve for x
    x = 2,445,783,272.35/56,731.32
  6. Step 6: Final answer
    x = 43,111.69

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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.