Home / 78,566.60-117,849.90-19,401.80

Finding the Fourth Proportional to 78,566.60, 117,849.90 and 19,401.80

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Solution

The fourth proportional to 78,566.60, 117,849.90 and 19,401.80 is: 29,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,566.60 : 117,849.90 = 19,401.80 : x
  2. Step 2: Convert to fraction form
    78,566.60/117,849.90 = 19,401.80/x
  3. Step 3: Cross multiply
    78,566.60x = 117,849.90 × 19,401.80
  4. Step 4: Simplify right side
    78,566.60x = 2,286,500,189.82
  5. Step 5: Solve for x
    x = 2,286,500,189.82/78,566.60
  6. Step 6: Final answer
    x = 29,102.70

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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.