Home / 71,222.75-98,278.89-39,387.32

Finding the Fourth Proportional to 71,222.75, 98,278.89 and 39,387.32

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Solution

The fourth proportional to 71,222.75, 98,278.89 and 39,387.32 is: 54,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,222.75 : 98,278.89 = 39,387.32 : x
  2. Step 2: Convert to fraction form
    71,222.75/98,278.89 = 39,387.32/x
  3. Step 3: Cross multiply
    71,222.75x = 98,278.89 × 39,387.32
  4. Step 4: Simplify right side
    71,222.75x = 3,870,942,089.67
  5. Step 5: Solve for x
    x = 3,870,942,089.67/71,222.75
  6. Step 6: Final answer
    x = 54,349.80

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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.