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Finding the Fourth Proportional to 86,313.45, 129,487.82 and 36,393.60

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Solution

The fourth proportional to 86,313.45, 129,487.82 and 36,393.60 is: 54,597.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,313.45 : 129,487.82 = 36,393.60 : x
  2. Step 2: Convert to fraction form
    86,313.45/129,487.82 = 36,393.60/x
  3. Step 3: Cross multiply
    86,313.45x = 129,487.82 × 36,393.60
  4. Step 4: Simplify right side
    86,313.45x = 4,712,528,016.94
  5. Step 5: Solve for x
    x = 4,712,528,016.94/86,313.45
  6. Step 6: Final answer
    x = 54,597.84

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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.