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Finding the Fourth Proportional to 131,647.91, 181,673.72 and 71,218.54

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Solution

The fourth proportional to 131,647.91, 181,673.72 and 71,218.54 is: 98,281.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,647.91 : 181,673.72 = 71,218.54 : x
  2. Step 2: Convert to fraction form
    131,647.91/181,673.72 = 71,218.54/x
  3. Step 3: Cross multiply
    131,647.91x = 181,673.72 × 71,218.54
  4. Step 4: Simplify right side
    131,647.91x = 12,938,537,974.08
  5. Step 5: Solve for x
    x = 12,938,537,974.08/131,647.91
  6. Step 6: Final answer
    x = 98,281.38

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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.