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Finding the Fourth Proportional to 86,335.41, 129,520.68 and 36,415.69

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Solution

The fourth proportional to 86,335.41, 129,520.68 and 36,415.69 is: 54,630.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,335.41 : 129,520.68 = 36,415.69 : x
  2. Step 2: Convert to fraction form
    86,335.41/129,520.68 = 36,415.69/x
  3. Step 3: Cross multiply
    86,335.41x = 129,520.68 × 36,415.69
  4. Step 4: Simplify right side
    86,335.41x = 4,716,584,607.67
  5. Step 5: Solve for x
    x = 4,716,584,607.67/86,335.41
  6. Step 6: Final answer
    x = 54,630.94

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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.