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Finding the Fourth Proportional to 91,181.72, 125,550.06 and 77,722.76

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Solution

The fourth proportional to 91,181.72, 125,550.06 and 77,722.76 is: 107,018.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,181.72 : 125,550.06 = 77,722.76 : x
  2. Step 2: Convert to fraction form
    91,181.72/125,550.06 = 77,722.76/x
  3. Step 3: Cross multiply
    91,181.72x = 125,550.06 × 77,722.76
  4. Step 4: Simplify right side
    91,181.72x = 9,758,097,181.37
  5. Step 5: Solve for x
    x = 9,758,097,181.37/91,181.72
  6. Step 6: Final answer
    x = 107,018.13

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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.