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Finding the Fourth Proportional to 58,646.90, 87,918.06 and 21,198.62

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Solution

The fourth proportional to 58,646.90, 87,918.06 and 21,198.62 is: 31,779.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,646.90 : 87,918.06 = 21,198.62 : x
  2. Step 2: Convert to fraction form
    58,646.90/87,918.06 = 21,198.62/x
  3. Step 3: Cross multiply
    58,646.90x = 87,918.06 × 21,198.62
  4. Step 4: Simplify right side
    58,646.90x = 1,863,741,545.08
  5. Step 5: Solve for x
    x = 1,863,741,545.08/58,646.90
  6. Step 6: Final answer
    x = 31,779.03

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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.