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Finding the Fourth Proportional to 72,341.64, 99,826.62 and 40,074.07

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Solution

The fourth proportional to 72,341.64, 99,826.62 and 40,074.07 is: 55,299.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,341.64 : 99,826.62 = 40,074.07 : x
  2. Step 2: Convert to fraction form
    72,341.64/99,826.62 = 40,074.07/x
  3. Step 3: Cross multiply
    72,341.64x = 99,826.62 × 40,074.07
  4. Step 4: Simplify right side
    72,341.64x = 4,000,458,957.74
  5. Step 5: Solve for x
    x = 4,000,458,957.74/72,341.64
  6. Step 6: Final answer
    x = 55,299.53

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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.