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Finding the Fourth Proportional to 72,496.68, 108,772.74 and 28,154.58

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Solution

The fourth proportional to 72,496.68, 108,772.74 and 28,154.58 is: 42,242.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,496.68 : 108,772.74 = 28,154.58 : x
  2. Step 2: Convert to fraction form
    72,496.68/108,772.74 = 28,154.58/x
  3. Step 3: Cross multiply
    72,496.68x = 108,772.74 × 28,154.58
  4. Step 4: Simplify right side
    72,496.68x = 3,062,450,810.15
  5. Step 5: Solve for x
    x = 3,062,450,810.15/72,496.68
  6. Step 6: Final answer
    x = 42,242.64

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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.