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Finding the Fourth Proportional to 79,842.65, 110,155.45 and 51,185.47

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Solution

The fourth proportional to 79,842.65, 110,155.45 and 51,185.47 is: 70,618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,842.65 : 110,155.45 = 51,185.47 : x
  2. Step 2: Convert to fraction form
    79,842.65/110,155.45 = 51,185.47/x
  3. Step 3: Cross multiply
    79,842.65x = 110,155.45 × 51,185.47
  4. Step 4: Simplify right side
    79,842.65x = 5,638,358,481.31
  5. Step 5: Solve for x
    x = 5,638,358,481.31/79,842.65
  6. Step 6: Final answer
    x = 70,618.38

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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.