Home / 78,011.06-117,021.45-31,257.86

Finding the Fourth Proportional to 78,011.06, 117,021.45 and 31,257.86

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Solution

The fourth proportional to 78,011.06, 117,021.45 and 31,257.86 is: 46,888.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,011.06 : 117,021.45 = 31,257.86 : x
  2. Step 2: Convert to fraction form
    78,011.06/117,021.45 = 31,257.86/x
  3. Step 3: Cross multiply
    78,011.06x = 117,021.45 × 31,257.86
  4. Step 4: Simplify right side
    78,011.06x = 3,657,840,101.10
  5. Step 5: Solve for x
    x = 3,657,840,101.10/78,011.06
  6. Step 6: Final answer
    x = 46,888.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.