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Finding the Fourth Proportional to 72,346.63, 99,836.03 and 40,079.93

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Solution

The fourth proportional to 72,346.63, 99,836.03 and 40,079.93 is: 55,309.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,346.63 : 99,836.03 = 40,079.93 : x
  2. Step 2: Convert to fraction form
    72,346.63/99,836.03 = 40,079.93/x
  3. Step 3: Cross multiply
    72,346.63x = 99,836.03 × 40,079.93
  4. Step 4: Simplify right side
    72,346.63x = 4,001,421,093.88
  5. Step 5: Solve for x
    x = 4,001,421,093.88/72,346.63
  6. Step 6: Final answer
    x = 55,309.02

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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.