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Finding the Fourth Proportional to 86,048.19, 128,926.65 and 52,698.60

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Solution

The fourth proportional to 86,048.19, 128,926.65 and 52,698.60 is: 78,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,048.19 : 128,926.65 = 52,698.60 : x
  2. Step 2: Convert to fraction form
    86,048.19/128,926.65 = 52,698.60/x
  3. Step 3: Cross multiply
    86,048.19x = 128,926.65 × 52,698.60
  4. Step 4: Simplify right side
    86,048.19x = 6,794,253,957.69
  5. Step 5: Solve for x
    x = 6,794,253,957.69/86,048.19
  6. Step 6: Final answer
    x = 78,958.71

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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.