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Finding the Fourth Proportional to 72,455.90, 108,671.54 and 19,148.46

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Solution

The fourth proportional to 72,455.90, 108,671.54 and 19,148.46 is: 28,719.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,455.90 : 108,671.54 = 19,148.46 : x
  2. Step 2: Convert to fraction form
    72,455.90/108,671.54 = 19,148.46/x
  3. Step 3: Cross multiply
    72,455.90x = 108,671.54 × 19,148.46
  4. Step 4: Simplify right side
    72,455.90x = 2,080,892,541.09
  5. Step 5: Solve for x
    x = 2,080,892,541.09/72,455.90
  6. Step 6: Final answer
    x = 28,719.44

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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.