Home / 78,771.12-118,081.88-31,415.28

Finding the Fourth Proportional to 78,771.12, 118,081.88 and 31,415.28

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Solution

The fourth proportional to 78,771.12, 118,081.88 and 31,415.28 is: 47,093.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,771.12 : 118,081.88 = 31,415.28 : x
  2. Step 2: Convert to fraction form
    78,771.12/118,081.88 = 31,415.28/x
  3. Step 3: Cross multiply
    78,771.12x = 118,081.88 × 31,415.28
  4. Step 4: Simplify right side
    78,771.12x = 3,709,575,323.13
  5. Step 5: Solve for x
    x = 3,709,575,323.13/78,771.12
  6. Step 6: Final answer
    x = 47,093.09

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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.