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Finding the Fourth Proportional to 72,291.86, 99,762.75 and 40,460.76

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Solution

The fourth proportional to 72,291.86, 99,762.75 and 40,460.76 is: 55,835.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.86 : 99,762.75 = 40,460.76 : x
  2. Step 2: Convert to fraction form
    72,291.86/99,762.75 = 40,460.76/x
  3. Step 3: Cross multiply
    72,291.86x = 99,762.75 × 40,460.76
  4. Step 4: Simplify right side
    72,291.86x = 4,036,476,684.69
  5. Step 5: Solve for x
    x = 4,036,476,684.69/72,291.86
  6. Step 6: Final answer
    x = 55,835.84

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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.