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Finding the Fourth Proportional to 72,699.69, 100,325.48 and 40,868.72

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Solution

The fourth proportional to 72,699.69, 100,325.48 and 40,868.72 is: 56,398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,699.69 : 100,325.48 = 40,868.72 : x
  2. Step 2: Convert to fraction form
    72,699.69/100,325.48 = 40,868.72/x
  3. Step 3: Cross multiply
    72,699.69x = 100,325.48 × 40,868.72
  4. Step 4: Simplify right side
    72,699.69x = 4,100,173,245.01
  5. Step 5: Solve for x
    x = 4,100,173,245.01/72,699.69
  6. Step 6: Final answer
    x = 56,398.77

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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.