Home / 105,513.87-145,609.57-57,771.66

Finding the Fourth Proportional to 105,513.87, 145,609.57 and 57,771.66

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Solution

The fourth proportional to 105,513.87, 145,609.57 and 57,771.66 is: 79,725.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,513.87 : 145,609.57 = 57,771.66 : x
  2. Step 2: Convert to fraction form
    105,513.87/145,609.57 = 57,771.66/x
  3. Step 3: Cross multiply
    105,513.87x = 145,609.57 × 57,771.66
  4. Step 4: Simplify right side
    105,513.87x = 8,412,106,570.79
  5. Step 5: Solve for x
    x = 8,412,106,570.79/105,513.87
  6. Step 6: Final answer
    x = 79,725.13

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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.