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Finding the Fourth Proportional to 81,530.33, 112,513.03 and 49,260.47

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Solution

The fourth proportional to 81,530.33, 112,513.03 and 49,260.47 is: 67,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,530.33 : 112,513.03 = 49,260.47 : x
  2. Step 2: Convert to fraction form
    81,530.33/112,513.03 = 49,260.47/x
  3. Step 3: Cross multiply
    81,530.33x = 112,513.03 × 49,260.47
  4. Step 4: Simplify right side
    81,530.33x = 5,542,444,897.06
  5. Step 5: Solve for x
    x = 5,542,444,897.06/81,530.33
  6. Step 6: Final answer
    x = 67,980.16

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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.