Home / 56,910.60-78,540.98-31,421.88

Finding the Fourth Proportional to 56,910.60, 78,540.98 and 31,421.88

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Solution

The fourth proportional to 56,910.60, 78,540.98 and 31,421.88 is: 43,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,910.60 : 78,540.98 = 31,421.88 : x
  2. Step 2: Convert to fraction form
    56,910.60/78,540.98 = 31,421.88/x
  3. Step 3: Cross multiply
    56,910.60x = 78,540.98 × 31,421.88
  4. Step 4: Simplify right side
    56,910.60x = 2,467,905,248.64
  5. Step 5: Solve for x
    x = 2,467,905,248.64/56,910.60
  6. Step 6: Final answer
    x = 43,364.60

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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.