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Finding the Fourth Proportional to 57,746.72, 86,628.90 and 15,628.16

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Solution

The fourth proportional to 57,746.72, 86,628.90 and 15,628.16 is: 23,444.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,746.72 : 86,628.90 = 15,628.16 : x
  2. Step 2: Convert to fraction form
    57,746.72/86,628.90 = 15,628.16/x
  3. Step 3: Cross multiply
    57,746.72x = 86,628.90 × 15,628.16
  4. Step 4: Simplify right side
    57,746.72x = 1,353,850,309.82
  5. Step 5: Solve for x
    x = 1,353,850,309.82/57,746.72
  6. Step 6: Final answer
    x = 23,444.63

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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.