Home / 105,357.35-145,268.92-85,151.75

Finding the Fourth Proportional to 105,357.35, 145,268.92 and 85,151.75

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Solution

The fourth proportional to 105,357.35, 145,268.92 and 85,151.75 is: 117,409.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,357.35 : 145,268.92 = 85,151.75 : x
  2. Step 2: Convert to fraction form
    105,357.35/145,268.92 = 85,151.75/x
  3. Step 3: Cross multiply
    105,357.35x = 145,268.92 × 85,151.75
  4. Step 4: Simplify right side
    105,357.35x = 12,369,902,908.90
  5. Step 5: Solve for x
    x = 12,369,902,908.90/105,357.35
  6. Step 6: Final answer
    x = 117,409.01

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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.