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Finding the Fourth Proportional to 84,049, 125,988.42 and 54,485.60

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Solution

The fourth proportional to 84,049, 125,988.42 and 54,485.60 is: 81,673.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,049 : 125,988.42 = 54,485.60 : x
  2. Step 2: Convert to fraction form
    84,049/125,988.42 = 54,485.60/x
  3. Step 3: Cross multiply
    84,049x = 125,988.42 × 54,485.60
  4. Step 4: Simplify right side
    84,049x = 6,864,554,656.75
  5. Step 5: Solve for x
    x = 6,864,554,656.75/84,049
  6. Step 6: Final answer
    x = 81,673.25

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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.