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Finding the Fourth Proportional to 58,438.08, 87,668.64 and 18,992.64

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Solution

The fourth proportional to 58,438.08, 87,668.64 and 18,992.64 is: 28,492.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,438.08 : 87,668.64 = 18,992.64 : x
  2. Step 2: Convert to fraction form
    58,438.08/87,668.64 = 18,992.64/x
  3. Step 3: Cross multiply
    58,438.08x = 87,668.64 × 18,992.64
  4. Step 4: Simplify right side
    58,438.08x = 1,665,058,918.81
  5. Step 5: Solve for x
    x = 1,665,058,918.81/58,438.08
  6. Step 6: Final answer
    x = 28,492.70

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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.