Home / 105,149.54-145,104.11-57,403.69

Finding the Fourth Proportional to 105,149.54, 145,104.11 and 57,403.69

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Solution

The fourth proportional to 105,149.54, 145,104.11 and 57,403.69 is: 79,215.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,149.54 : 145,104.11 = 57,403.69 : x
  2. Step 2: Convert to fraction form
    105,149.54/145,104.11 = 57,403.69/x
  3. Step 3: Cross multiply
    105,149.54x = 145,104.11 × 57,403.69
  4. Step 4: Simplify right side
    105,149.54x = 8,329,510,913.65
  5. Step 5: Solve for x
    x = 8,329,510,913.65/105,149.54
  6. Step 6: Final answer
    x = 79,215.86

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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.