Home / 78,720.80-117,999.18-34,335.63

Finding the Fourth Proportional to 78,720.80, 117,999.18 and 34,335.63

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Solution

The fourth proportional to 78,720.80, 117,999.18 and 34,335.63 is: 51,467.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720.80 : 117,999.18 = 34,335.63 : x
  2. Step 2: Convert to fraction form
    78,720.80/117,999.18 = 34,335.63/x
  3. Step 3: Cross multiply
    78,720.80x = 117,999.18 × 34,335.63
  4. Step 4: Simplify right side
    78,720.80x = 4,051,576,184.78
  5. Step 5: Solve for x
    x = 4,051,576,184.78/78,720.80
  6. Step 6: Final answer
    x = 51,467.67

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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.