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Finding the Fourth Proportional to 71,605.15, 107,399.52 and 19,018.73

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Solution

The fourth proportional to 71,605.15, 107,399.52 and 19,018.73 is: 28,525.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,605.15 : 107,399.52 = 19,018.73 : x
  2. Step 2: Convert to fraction form
    71,605.15/107,399.52 = 19,018.73/x
  3. Step 3: Cross multiply
    71,605.15x = 107,399.52 × 19,018.73
  4. Step 4: Simplify right side
    71,605.15x = 2,042,602,741.51
  5. Step 5: Solve for x
    x = 2,042,602,741.51/71,605.15
  6. Step 6: Final answer
    x = 28,525.92

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1.5x scale

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.