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Finding the Fourth Proportional to 72,804.45, 100,442.76 and 42,580.11

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Solution

The fourth proportional to 72,804.45, 100,442.76 and 42,580.11 is: 58,744.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,804.45 : 100,442.76 = 42,580.11 : x
  2. Step 2: Convert to fraction form
    72,804.45/100,442.76 = 42,580.11/x
  3. Step 3: Cross multiply
    72,804.45x = 100,442.76 × 42,580.11
  4. Step 4: Simplify right side
    72,804.45x = 4,276,863,769.50
  5. Step 5: Solve for x
    x = 4,276,863,769.50/72,804.45
  6. Step 6: Final answer
    x = 58,744.54

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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.