Home / 78,211.38-117,317.01-28,279.77

Finding the Fourth Proportional to 78,211.38, 117,317.01 and 28,279.77

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Solution

The fourth proportional to 78,211.38, 117,317.01 and 28,279.77 is: 42,419.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,211.38 : 117,317.01 = 28,279.77 : x
  2. Step 2: Convert to fraction form
    78,211.38/117,317.01 = 28,279.77/x
  3. Step 3: Cross multiply
    78,211.38x = 117,317.01 × 28,279.77
  4. Step 4: Simplify right side
    78,211.38x = 3,317,698,059.89
  5. Step 5: Solve for x
    x = 3,317,698,059.89/78,211.38
  6. Step 6: Final answer
    x = 42,419.63

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1.5x scale

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.