Home / 78,060.40-117,054.09-28,133.92

Finding the Fourth Proportional to 78,060.40, 117,054.09 and 28,133.92

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Solution

The fourth proportional to 78,060.40, 117,054.09 and 28,133.92 is: 42,187.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,060.40 : 117,054.09 = 28,133.92 : x
  2. Step 2: Convert to fraction form
    78,060.40/117,054.09 = 28,133.92/x
  3. Step 3: Cross multiply
    78,060.40x = 117,054.09 × 28,133.92
  4. Step 4: Simplify right side
    78,060.40x = 3,293,190,403.73
  5. Step 5: Solve for x
    x = 3,293,190,403.73/78,060.40
  6. Step 6: Final answer
    x = 42,187.72

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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.