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Finding the Fourth Proportional to 86,321.89, 119,078.49 and 59,417.65

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Solution

The fourth proportional to 86,321.89, 119,078.49 and 59,417.65 is: 81,964.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,321.89 : 119,078.49 = 59,417.65 : x
  2. Step 2: Convert to fraction form
    86,321.89/119,078.49 = 59,417.65/x
  3. Step 3: Cross multiply
    86,321.89x = 119,078.49 × 59,417.65
  4. Step 4: Simplify right side
    86,321.89x = 7,075,364,041.35
  5. Step 5: Solve for x
    x = 7,075,364,041.35/86,321.89
  6. Step 6: Final answer
    x = 81,964.89

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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.