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Finding the Fourth Proportional to 72,490.41, 100,080.50 and 47,383.65

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Solution

The fourth proportional to 72,490.41, 100,080.50 and 47,383.65 is: 65,418.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.41 : 100,080.50 = 47,383.65 : x
  2. Step 2: Convert to fraction form
    72,490.41/100,080.50 = 47,383.65/x
  3. Step 3: Cross multiply
    72,490.41x = 100,080.50 × 47,383.65
  4. Step 4: Simplify right side
    72,490.41x = 4,742,179,146.91
  5. Step 5: Solve for x
    x = 4,742,179,146.91/72,490.41
  6. Step 6: Final answer
    x = 65,418.02

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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.