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Finding the Fourth Proportional to 72,521.92, 100,081.80 and 40,693.12

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Solution

The fourth proportional to 72,521.92, 100,081.80 and 40,693.12 is: 56,157.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,521.92 : 100,081.80 = 40,693.12 : x
  2. Step 2: Convert to fraction form
    72,521.92/100,081.80 = 40,693.12/x
  3. Step 3: Cross multiply
    72,521.92x = 100,081.80 × 40,693.12
  4. Step 4: Simplify right side
    72,521.92x = 4,072,640,697.22
  5. Step 5: Solve for x
    x = 4,072,640,697.22/72,521.92
  6. Step 6: Final answer
    x = 56,157.38

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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.