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Finding the Fourth Proportional to 86,627.80, 129,990.30 and 36,699.40

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Solution

The fourth proportional to 86,627.80, 129,990.30 and 36,699.40 is: 55,069.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,627.80 : 129,990.30 = 36,699.40 : x
  2. Step 2: Convert to fraction form
    86,627.80/129,990.30 = 36,699.40/x
  3. Step 3: Cross multiply
    86,627.80x = 129,990.30 × 36,699.40
  4. Step 4: Simplify right side
    86,627.80x = 4,770,566,015.82
  5. Step 5: Solve for x
    x = 4,770,566,015.82/86,627.80
  6. Step 6: Final answer
    x = 55,069.69

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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.