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Finding the Fourth Proportional to 91,297.96, 125,507.47 and 78,504.28

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Solution

The fourth proportional to 91,297.96, 125,507.47 and 78,504.28 is: 107,919.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,297.96 : 125,507.47 = 78,504.28 : x
  2. Step 2: Convert to fraction form
    91,297.96/125,507.47 = 78,504.28/x
  3. Step 3: Cross multiply
    91,297.96x = 125,507.47 × 78,504.28
  4. Step 4: Simplify right side
    91,297.96x = 9,852,873,566.97
  5. Step 5: Solve for x
    x = 9,852,873,566.97/91,297.96
  6. Step 6: Final answer
    x = 107,919.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.