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Finding the Fourth Proportional to 86,322.89, 119,079.87 and 59,418.65

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Solution

The fourth proportional to 86,322.89, 119,079.87 and 59,418.65 is: 81,966.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,322.89 : 119,079.87 = 59,418.65 : x
  2. Step 2: Convert to fraction form
    86,322.89/119,079.87 = 59,418.65/x
  3. Step 3: Cross multiply
    86,322.89x = 119,079.87 × 59,418.65
  4. Step 4: Simplify right side
    86,322.89x = 7,075,565,117.58
  5. Step 5: Solve for x
    x = 7,075,565,117.58/86,322.89
  6. Step 6: Final answer
    x = 81,966.27

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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.