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Finding the Fourth Proportional to 86,717.59, 119,566.94 and 72,398.21

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Solution

The fourth proportional to 86,717.59, 119,566.94 and 72,398.21 is: 99,823.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,717.59 : 119,566.94 = 72,398.21 : x
  2. Step 2: Convert to fraction form
    86,717.59/119,566.94 = 72,398.21/x
  3. Step 3: Cross multiply
    86,717.59x = 119,566.94 × 72,398.21
  4. Step 4: Simplify right side
    86,717.59x = 8,656,431,471.35
  5. Step 5: Solve for x
    x = 8,656,431,471.35/86,717.59
  6. Step 6: Final answer
    x = 99,823.25

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1.5x scale

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.