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Finding the Fourth Proportional to 58,267.72, 87,388.94 and 20,830.40

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Solution

The fourth proportional to 58,267.72, 87,388.94 and 20,830.40 is: 31,241.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,267.72 : 87,388.94 = 20,830.40 : x
  2. Step 2: Convert to fraction form
    58,267.72/87,388.94 = 20,830.40/x
  3. Step 3: Cross multiply
    58,267.72x = 87,388.94 × 20,830.40
  4. Step 4: Simplify right side
    58,267.72x = 1,820,346,518.62
  5. Step 5: Solve for x
    x = 1,820,346,518.62/58,267.72
  6. Step 6: Final answer
    x = 31,241.08

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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.