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Finding the Fourth Proportional to 58,020.63, 87,069.84 and 21,084.63

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Solution

The fourth proportional to 58,020.63, 87,069.84 and 21,084.63 is: 31,641.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,020.63 : 87,069.84 = 21,084.63 : x
  2. Step 2: Convert to fraction form
    58,020.63/87,069.84 = 21,084.63/x
  3. Step 3: Cross multiply
    58,020.63x = 87,069.84 × 21,084.63
  4. Step 4: Simplify right side
    58,020.63x = 1,835,835,360.56
  5. Step 5: Solve for x
    x = 1,835,835,360.56/58,020.63
  6. Step 6: Final answer
    x = 31,641.08

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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.