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Finding the Fourth Proportional to 72,992.96, 100,900.32 and 65,113.28

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Solution

The fourth proportional to 72,992.96, 100,900.32 and 65,113.28 is: 90,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,992.96 : 100,900.32 = 65,113.28 : x
  2. Step 2: Convert to fraction form
    72,992.96/100,900.32 = 65,113.28/x
  3. Step 3: Cross multiply
    72,992.96x = 100,900.32 × 65,113.28
  4. Step 4: Simplify right side
    72,992.96x = 6,569,950,788.25
  5. Step 5: Solve for x
    x = 6,569,950,788.25/72,992.96
  6. Step 6: Final answer
    x = 90,008.01

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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.