Home / 107,931.37-148,986.35-81,151.66

Finding the Fourth Proportional to 107,931.37, 148,986.35 and 81,151.66

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Solution

The fourth proportional to 107,931.37, 148,986.35 and 81,151.66 is: 112,020.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,931.37 : 148,986.35 = 81,151.66 : x
  2. Step 2: Convert to fraction form
    107,931.37/148,986.35 = 81,151.66/x
  3. Step 3: Cross multiply
    107,931.37x = 148,986.35 × 81,151.66
  4. Step 4: Simplify right side
    107,931.37x = 12,090,489,619.84
  5. Step 5: Solve for x
    x = 12,090,489,619.84/107,931.37
  6. Step 6: Final answer
    x = 112,020.16

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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.