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Finding the Fourth Proportional to 86,685.64, 130,060.72 and 53,020.68

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Solution

The fourth proportional to 86,685.64, 130,060.72 and 53,020.68 is: 79,550.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,685.64 : 130,060.72 = 53,020.68 : x
  2. Step 2: Convert to fraction form
    86,685.64/130,060.72 = 53,020.68/x
  3. Step 3: Cross multiply
    86,685.64x = 130,060.72 × 53,020.68
  4. Step 4: Simplify right side
    86,685.64x = 6,895,907,815.69
  5. Step 5: Solve for x
    x = 6,895,907,815.69/86,685.64
  6. Step 6: Final answer
    x = 79,550.75

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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.