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Finding the Fourth Proportional to 86,293.49, 129,486.74 and 36,408.15

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Solution

The fourth proportional to 86,293.49, 129,486.74 and 36,408.15 is: 54,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,293.49 : 129,486.74 = 36,408.15 : x
  2. Step 2: Convert to fraction form
    86,293.49/129,486.74 = 36,408.15/x
  3. Step 3: Cross multiply
    86,293.49x = 129,486.74 × 36,408.15
  4. Step 4: Simplify right side
    86,293.49x = 4,714,372,470.89
  5. Step 5: Solve for x
    x = 4,714,372,470.89/86,293.49
  6. Step 6: Final answer
    x = 54,631.85

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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.