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Finding the Fourth Proportional to 58,653.12, 87,981.12 and 19,208.64

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Solution

The fourth proportional to 58,653.12, 87,981.12 and 19,208.64 is: 28,813.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,653.12 : 87,981.12 = 19,208.64 : x
  2. Step 2: Convert to fraction form
    58,653.12/87,981.12 = 19,208.64/x
  3. Step 3: Cross multiply
    58,653.12x = 87,981.12 × 19,208.64
  4. Step 4: Simplify right side
    58,653.12x = 1,689,997,660.88
  5. Step 5: Solve for x
    x = 1,689,997,660.88/58,653.12
  6. Step 6: Final answer
    x = 28,813.43

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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.