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Finding the Fourth Proportional to 76,659.26, 105,776.61 and 70,458.33

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Solution

The fourth proportional to 76,659.26, 105,776.61 and 70,458.33 is: 97,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,659.26 : 105,776.61 = 70,458.33 : x
  2. Step 2: Convert to fraction form
    76,659.26/105,776.61 = 70,458.33/x
  3. Step 3: Cross multiply
    76,659.26x = 105,776.61 × 70,458.33
  4. Step 4: Simplify right side
    76,659.26x = 7,452,843,293.66
  5. Step 5: Solve for x
    x = 7,452,843,293.66/76,659.26
  6. Step 6: Final answer
    x = 97,220.40

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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.