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Finding the Fourth Proportional to 58,608.64, 87,859.84 and 21,159.84

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Solution

The fourth proportional to 58,608.64, 87,859.84 and 21,159.84 is: 31,720.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,608.64 : 87,859.84 = 21,159.84 : x
  2. Step 2: Convert to fraction form
    58,608.64/87,859.84 = 21,159.84/x
  3. Step 3: Cross multiply
    58,608.64x = 87,859.84 × 21,159.84
  4. Step 4: Simplify right side
    58,608.64x = 1,859,100,156.83
  5. Step 5: Solve for x
    x = 1,859,100,156.83/58,608.64
  6. Step 6: Final answer
    x = 31,720.58

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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.