Home / 56,978.40-78,630.12-31,827.90

Finding the Fourth Proportional to 56,978.40, 78,630.12 and 31,827.90

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Solution

The fourth proportional to 56,978.40, 78,630.12 and 31,827.90 is: 43,922.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,978.40 : 78,630.12 = 31,827.90 : x
  2. Step 2: Convert to fraction form
    56,978.40/78,630.12 = 31,827.90/x
  3. Step 3: Cross multiply
    56,978.40x = 78,630.12 × 31,827.90
  4. Step 4: Simplify right side
    56,978.40x = 2,502,631,596.35
  5. Step 5: Solve for x
    x = 2,502,631,596.35/56,978.40
  6. Step 6: Final answer
    x = 43,922.46

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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.