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Finding the Fourth Proportional to 81,858.69, 122,788.08 and 25,698.55

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Solution

The fourth proportional to 81,858.69, 122,788.08 and 25,698.55 is: 38,547.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,858.69 : 122,788.08 = 25,698.55 : x
  2. Step 2: Convert to fraction form
    81,858.69/122,788.08 = 25,698.55/x
  3. Step 3: Cross multiply
    81,858.69x = 122,788.08 × 25,698.55
  4. Step 4: Simplify right side
    81,858.69x = 3,155,475,613.28
  5. Step 5: Solve for x
    x = 3,155,475,613.28/81,858.69
  6. Step 6: Final answer
    x = 38,547.84

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1.5x scale

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.