Home / 131,821.98-181,913.34-71,391.21

Finding the Fourth Proportional to 131,821.98, 181,913.34 and 71,391.21

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Solution

The fourth proportional to 131,821.98, 181,913.34 and 71,391.21 is: 98,519.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,821.98 : 181,913.34 = 71,391.21 : x
  2. Step 2: Convert to fraction form
    131,821.98/181,913.34 = 71,391.21/x
  3. Step 3: Cross multiply
    131,821.98x = 181,913.34 × 71,391.21
  4. Step 4: Simplify right side
    131,821.98x = 12,987,013,457.74
  5. Step 5: Solve for x
    x = 12,987,013,457.74/131,821.98
  6. Step 6: Final answer
    x = 98,519.33

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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.