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Finding the Fourth Proportional to 86,707.89, 119,621.48 and 68,730.75

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Solution

The fourth proportional to 86,707.89, 119,621.48 and 68,730.75 is: 94,820.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,707.89 : 119,621.48 = 68,730.75 : x
  2. Step 2: Convert to fraction form
    86,707.89/119,621.48 = 68,730.75/x
  3. Step 3: Cross multiply
    86,707.89x = 119,621.48 × 68,730.75
  4. Step 4: Simplify right side
    86,707.89x = 8,221,673,692.86
  5. Step 5: Solve for x
    x = 8,221,673,692.86/86,707.89
  6. Step 6: Final answer
    x = 94,820.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.