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Finding the Fourth Proportional to 58,643.80, 87,965.19 and 21,189.70

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Solution

The fourth proportional to 58,643.80, 87,965.19 and 21,189.70 is: 31,784.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,643.80 : 87,965.19 = 21,189.70 : x
  2. Step 2: Convert to fraction form
    58,643.80/87,965.19 = 21,189.70/x
  3. Step 3: Cross multiply
    58,643.80x = 87,965.19 × 21,189.70
  4. Step 4: Simplify right side
    58,643.80x = 1,863,956,096.50
  5. Step 5: Solve for x
    x = 1,863,956,096.50/58,643.80
  6. Step 6: Final answer
    x = 31,784.37

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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.