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Finding the Fourth Proportional to 72,374.72, 99,879.08 and 40,542.93

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Solution

The fourth proportional to 72,374.72, 99,879.08 and 40,542.93 is: 55,950.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,374.72 : 99,879.08 = 40,542.93 : x
  2. Step 2: Convert to fraction form
    72,374.72/99,879.08 = 40,542.93/x
  3. Step 3: Cross multiply
    72,374.72x = 99,879.08 × 40,542.93
  4. Step 4: Simplify right side
    72,374.72x = 4,049,390,346.19
  5. Step 5: Solve for x
    x = 4,049,390,346.19/72,374.72
  6. Step 6: Final answer
    x = 55,950.35

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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.