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Finding the Fourth Proportional to 83,656.13, 125,485.80 and 20,476.79

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Solution

The fourth proportional to 83,656.13, 125,485.80 and 20,476.79 is: 30,715.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,656.13 : 125,485.80 = 20,476.79 : x
  2. Step 2: Convert to fraction form
    83,656.13/125,485.80 = 20,476.79/x
  3. Step 3: Cross multiply
    83,656.13x = 125,485.80 × 20,476.79
  4. Step 4: Simplify right side
    83,656.13x = 2,569,546,140.94
  5. Step 5: Solve for x
    x = 2,569,546,140.94/83,656.13
  6. Step 6: Final answer
    x = 30,715.58

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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.