Home / 105,427.70-145,513.58-72,767.97

Finding the Fourth Proportional to 105,427.70, 145,513.58 and 72,767.97

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Solution

The fourth proportional to 105,427.70, 145,513.58 and 72,767.97 is: 100,435.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,427.70 : 145,513.58 = 72,767.97 : x
  2. Step 2: Convert to fraction form
    105,427.70/145,513.58 = 72,767.97/x
  3. Step 3: Cross multiply
    105,427.70x = 145,513.58 × 72,767.97
  4. Step 4: Simplify right side
    105,427.70x = 10,588,727,824.03
  5. Step 5: Solve for x
    x = 10,588,727,824.03/105,427.70
  6. Step 6: Final answer
    x = 100,435.92

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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.