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Finding the Fourth Proportional to 58,664.64, 88,014.24 and 21,720

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Solution

The fourth proportional to 58,664.64, 88,014.24 and 21,720 is: 32,586.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,664.64 : 88,014.24 = 21,720 : x
  2. Step 2: Convert to fraction form
    58,664.64/88,014.24 = 21,720/x
  3. Step 3: Cross multiply
    58,664.64x = 88,014.24 × 21,720
  4. Step 4: Simplify right side
    58,664.64x = 1,911,669,292.80
  5. Step 5: Solve for x
    x = 1,911,669,292.80/58,664.64
  6. Step 6: Final answer
    x = 32,586.40

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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.