Home / 105,723.12-145,890.78-57,975.45

Finding the Fourth Proportional to 105,723.12, 145,890.78 and 57,975.45

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Solution

The fourth proportional to 105,723.12, 145,890.78 and 57,975.45 is: 80,002.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,723.12 : 145,890.78 = 57,975.45 : x
  2. Step 2: Convert to fraction form
    105,723.12/145,890.78 = 57,975.45/x
  3. Step 3: Cross multiply
    105,723.12x = 145,890.78 × 57,975.45
  4. Step 4: Simplify right side
    105,723.12x = 8,458,083,621.35
  5. Step 5: Solve for x
    x = 8,458,083,621.35/105,723.12
  6. Step 6: Final answer
    x = 80,002.21

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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.