Home / 78,669.76-117,900.96-31,897.12

Finding the Fourth Proportional to 78,669.76, 117,900.96 and 31,897.12

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Solution

The fourth proportional to 78,669.76, 117,900.96 and 31,897.12 is: 47,803.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,669.76 : 117,900.96 = 31,897.12 : x
  2. Step 2: Convert to fraction form
    78,669.76/117,900.96 = 31,897.12/x
  3. Step 3: Cross multiply
    78,669.76x = 117,900.96 × 31,897.12
  4. Step 4: Simplify right side
    78,669.76x = 3,760,701,069.24
  5. Step 5: Solve for x
    x = 3,760,701,069.24/78,669.76
  6. Step 6: Final answer
    x = 47,803.64

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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.