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Finding the Fourth Proportional to 72,029.80, 107,979.90 and 47,081.80

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Solution

The fourth proportional to 72,029.80, 107,979.90 and 47,081.80 is: 70,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.80 : 107,979.90 = 47,081.80 : x
  2. Step 2: Convert to fraction form
    72,029.80/107,979.90 = 47,081.80/x
  3. Step 3: Cross multiply
    72,029.80x = 107,979.90 × 47,081.80
  4. Step 4: Simplify right side
    72,029.80x = 5,083,888,055.82
  5. Step 5: Solve for x
    x = 5,083,888,055.82/72,029.80
  6. Step 6: Final answer
    x = 70,580.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.