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Finding the Fourth Proportional to 81,328.69, 112,302.86 and 51,164.49

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Solution

The fourth proportional to 81,328.69, 112,302.86 and 51,164.49 is: 70,650.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,328.69 : 112,302.86 = 51,164.49 : x
  2. Step 2: Convert to fraction form
    81,328.69/112,302.86 = 51,164.49/x
  3. Step 3: Cross multiply
    81,328.69x = 112,302.86 × 51,164.49
  4. Step 4: Simplify right side
    81,328.69x = 5,745,918,557.44
  5. Step 5: Solve for x
    x = 5,745,918,557.44/81,328.69
  6. Step 6: Final answer
    x = 70,650.57

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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.