Home / 78,373.22-117,479.40-30,969.12

Finding the Fourth Proportional to 78,373.22, 117,479.40 and 30,969.12

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Solution

The fourth proportional to 78,373.22, 117,479.40 and 30,969.12 is: 46,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,373.22 : 117,479.40 = 30,969.12 : x
  2. Step 2: Convert to fraction form
    78,373.22/117,479.40 = 30,969.12/x
  3. Step 3: Cross multiply
    78,373.22x = 117,479.40 × 30,969.12
  4. Step 4: Simplify right side
    78,373.22x = 3,638,233,636.13
  5. Step 5: Solve for x
    x = 3,638,233,636.13/78,373.22
  6. Step 6: Final answer
    x = 46,421.90

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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.