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Finding the Fourth Proportional to 72,496.72, 100,038.76 and 40,659.48

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Solution

The fourth proportional to 72,496.72, 100,038.76 and 40,659.48 is: 56,106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,496.72 : 100,038.76 = 40,659.48 : x
  2. Step 2: Convert to fraction form
    72,496.72/100,038.76 = 40,659.48/x
  3. Step 3: Cross multiply
    72,496.72x = 100,038.76 × 40,659.48
  4. Step 4: Simplify right side
    72,496.72x = 4,067,523,961.44
  5. Step 5: Solve for x
    x = 4,067,523,961.44/72,496.72
  6. Step 6: Final answer
    x = 56,106.32

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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.