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Finding the Fourth Proportional to 72,578.77, 100,156.13 and 40,749.01

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Solution

The fourth proportional to 72,578.77, 100,156.13 and 40,749.01 is: 56,232.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578.77 : 100,156.13 = 40,749.01 : x
  2. Step 2: Convert to fraction form
    72,578.77/100,156.13 = 40,749.01/x
  3. Step 3: Cross multiply
    72,578.77x = 100,156.13 × 40,749.01
  4. Step 4: Simplify right side
    72,578.77x = 4,081,262,841.60
  5. Step 5: Solve for x
    x = 4,081,262,841.60/72,578.77
  6. Step 6: Final answer
    x = 56,232.19

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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.