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Finding the Fourth Proportional to 131,005.69, 180,775.92 and 75,805.47

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Solution

The fourth proportional to 131,005.69, 180,775.92 and 75,805.47 is: 104,604.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,005.69 : 180,775.92 = 75,805.47 : x
  2. Step 2: Convert to fraction form
    131,005.69/180,775.92 = 75,805.47/x
  3. Step 3: Cross multiply
    131,005.69x = 180,775.92 × 75,805.47
  4. Step 4: Simplify right side
    131,005.69x = 13,703,802,938.83
  5. Step 5: Solve for x
    x = 13,703,802,938.83/131,005.69
  6. Step 6: Final answer
    x = 104,604.64

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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.