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Finding the Fourth Proportional to 86,273.64, 129,409.98 and 68,777.64

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Solution

The fourth proportional to 86,273.64, 129,409.98 and 68,777.64 is: 103,166.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,273.64 : 129,409.98 = 68,777.64 : x
  2. Step 2: Convert to fraction form
    86,273.64/129,409.98 = 68,777.64/x
  3. Step 3: Cross multiply
    86,273.64x = 129,409.98 × 68,777.64
  4. Step 4: Simplify right side
    86,273.64x = 8,900,513,016.85
  5. Step 5: Solve for x
    x = 8,900,513,016.85/86,273.64
  6. Step 6: Final answer
    x = 103,166.08

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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.