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Finding the Fourth Proportional to 130,979.63, 180,751.89 and 71,363.63

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Solution

The fourth proportional to 130,979.63, 180,751.89 and 71,363.63 is: 98,481.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,979.63 : 180,751.89 = 71,363.63 : x
  2. Step 2: Convert to fraction form
    130,979.63/180,751.89 = 71,363.63/x
  3. Step 3: Cross multiply
    130,979.63x = 180,751.89 × 71,363.63
  4. Step 4: Simplify right side
    130,979.63x = 12,899,110,999.76
  5. Step 5: Solve for x
    x = 12,899,110,999.76/130,979.63
  6. Step 6: Final answer
    x = 98,481.81

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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.