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Finding the Fourth Proportional to 58,118.79, 87,216.53 and 21,182.79

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Solution

The fourth proportional to 58,118.79, 87,216.53 and 21,182.79 is: 31,788.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,118.79 : 87,216.53 = 21,182.79 : x
  2. Step 2: Convert to fraction form
    58,118.79/87,216.53 = 21,182.79/x
  3. Step 3: Cross multiply
    58,118.79x = 87,216.53 × 21,182.79
  4. Step 4: Simplify right side
    58,118.79x = 1,847,489,333.60
  5. Step 5: Solve for x
    x = 1,847,489,333.60/58,118.79
  6. Step 6: Final answer
    x = 31,788.16

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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.