Home / 105,149.93-145,109.09-57,405.29

Finding the Fourth Proportional to 105,149.93, 145,109.09 and 57,405.29

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Solution

The fourth proportional to 105,149.93, 145,109.09 and 57,405.29 is: 79,220.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,149.93 : 145,109.09 = 57,405.29 : x
  2. Step 2: Convert to fraction form
    105,149.93/145,109.09 = 57,405.29/x
  3. Step 3: Cross multiply
    105,149.93x = 145,109.09 × 57,405.29
  4. Step 4: Simplify right side
    105,149.93x = 8,330,028,811.05
  5. Step 5: Solve for x
    x = 8,330,028,811.05/105,149.93
  6. Step 6: Final answer
    x = 79,220.49

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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.