Home / 72,106.40-99,501.21-39,839.65

Finding the Fourth Proportional to 72,106.40, 99,501.21 and 39,839.65

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Solution

The fourth proportional to 72,106.40, 99,501.21 and 39,839.65 is: 54,975.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,106.40 : 99,501.21 = 39,839.65 : x
  2. Step 2: Convert to fraction form
    72,106.40/99,501.21 = 39,839.65/x
  3. Step 3: Cross multiply
    72,106.40x = 99,501.21 × 39,839.65
  4. Step 4: Simplify right side
    72,106.40x = 3,964,093,132.22
  5. Step 5: Solve for x
    x = 3,964,093,132.22/72,106.40
  6. Step 6: Final answer
    x = 54,975.61

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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.