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Finding the Fourth Proportional to 86,561.62, 119,457.05 and 54,297.61

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Solution

The fourth proportional to 86,561.62, 119,457.05 and 54,297.61 is: 74,931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,561.62 : 119,457.05 = 54,297.61 : x
  2. Step 2: Convert to fraction form
    86,561.62/119,457.05 = 54,297.61/x
  3. Step 3: Cross multiply
    86,561.62x = 119,457.05 × 54,297.61
  4. Step 4: Simplify right side
    86,561.62x = 6,486,231,742.52
  5. Step 5: Solve for x
    x = 6,486,231,742.52/86,561.62
  6. Step 6: Final answer
    x = 74,931.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.