Home / 78,120.25-117,185.84-38,666.77

Finding the Fourth Proportional to 78,120.25, 117,185.84 and 38,666.77

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Solution

The fourth proportional to 78,120.25, 117,185.84 and 38,666.77 is: 58,002.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.25 : 117,185.84 = 38,666.77 : x
  2. Step 2: Convert to fraction form
    78,120.25/117,185.84 = 38,666.77/x
  3. Step 3: Cross multiply
    78,120.25x = 117,185.84 × 38,666.77
  4. Step 4: Simplify right side
    78,120.25x = 4,531,197,581.24
  5. Step 5: Solve for x
    x = 4,531,197,581.24/78,120.25
  6. Step 6: Final answer
    x = 58,002.86

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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.