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Finding the Fourth Proportional to 72,370.32, 99,919.84 and 45,187.84

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Solution

The fourth proportional to 72,370.32, 99,919.84 and 45,187.84 is: 62,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,370.32 : 99,919.84 = 45,187.84 : x
  2. Step 2: Convert to fraction form
    72,370.32/99,919.84 = 45,187.84/x
  3. Step 3: Cross multiply
    72,370.32x = 99,919.84 × 45,187.84
  4. Step 4: Simplify right side
    72,370.32x = 4,515,161,742.75
  5. Step 5: Solve for x
    x = 4,515,161,742.75/72,370.32
  6. Step 6: Final answer
    x = 62,389.69

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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.