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Finding the Fourth Proportional to 86,628.60, 129,955.98 and 36,708.90

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Solution

The fourth proportional to 86,628.60, 129,955.98 and 36,708.90 is: 55,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,628.60 : 129,955.98 = 36,708.90 : x
  2. Step 2: Convert to fraction form
    86,628.60/129,955.98 = 36,708.90/x
  3. Step 3: Cross multiply
    86,628.60x = 129,955.98 × 36,708.90
  4. Step 4: Simplify right side
    86,628.60x = 4,770,541,074.22
  5. Step 5: Solve for x
    x = 4,770,541,074.22/86,628.60
  6. Step 6: Final answer
    x = 55,068.89

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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.