Home / 105,186.96-145,311.56-91,015.20

Finding the Fourth Proportional to 105,186.96, 145,311.56 and 91,015.20

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Solution

The fourth proportional to 105,186.96, 145,311.56 and 91,015.20 is: 125,733.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,186.96 : 145,311.56 = 91,015.20 : x
  2. Step 2: Convert to fraction form
    105,186.96/145,311.56 = 91,015.20/x
  3. Step 3: Cross multiply
    105,186.96x = 145,311.56 × 91,015.20
  4. Step 4: Simplify right side
    105,186.96x = 13,225,560,695.71
  5. Step 5: Solve for x
    x = 13,225,560,695.71/105,186.96
  6. Step 6: Final answer
    x = 125,733.84

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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.