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Finding the Fourth Proportional to 72,384.56, 108,559.68 and 40,808.60

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Solution

The fourth proportional to 72,384.56, 108,559.68 and 40,808.60 is: 61,203.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,384.56 : 108,559.68 = 40,808.60 : x
  2. Step 2: Convert to fraction form
    72,384.56/108,559.68 = 40,808.60/x
  3. Step 3: Cross multiply
    72,384.56x = 108,559.68 × 40,808.60
  4. Step 4: Simplify right side
    72,384.56x = 4,430,168,557.25
  5. Step 5: Solve for x
    x = 4,430,168,557.25/72,384.56
  6. Step 6: Final answer
    x = 61,203.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.