Home / 78,059.19-117,155.16-30,707.40

Finding the Fourth Proportional to 78,059.19, 117,155.16 and 30,707.40

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Solution

The fourth proportional to 78,059.19, 117,155.16 and 30,707.40 is: 46,087.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,059.19 : 117,155.16 = 30,707.40 : x
  2. Step 2: Convert to fraction form
    78,059.19/117,155.16 = 30,707.40/x
  3. Step 3: Cross multiply
    78,059.19x = 117,155.16 × 30,707.40
  4. Step 4: Simplify right side
    78,059.19x = 3,597,530,799.52
  5. Step 5: Solve for x
    x = 3,597,530,799.52/78,059.19
  6. Step 6: Final answer
    x = 46,087.21

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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.