Home / 105,162.64-145,118.91-57,406.75

Finding the Fourth Proportional to 105,162.64, 145,118.91 and 57,406.75

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Solution

The fourth proportional to 105,162.64, 145,118.91 and 57,406.75 is: 79,218.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,162.64 : 145,118.91 = 57,406.75 : x
  2. Step 2: Convert to fraction form
    105,162.64/145,118.91 = 57,406.75/x
  3. Step 3: Cross multiply
    105,162.64x = 145,118.91 × 57,406.75
  4. Step 4: Simplify right side
    105,162.64x = 8,330,804,986.64
  5. Step 5: Solve for x
    x = 8,330,804,986.64/105,162.64
  6. Step 6: Final answer
    x = 79,218.29

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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.