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Finding the Fourth Proportional to 45,717.34, 63,128.87 and 28,749.99

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Solution

The fourth proportional to 45,717.34, 63,128.87 and 28,749.99 is: 39,699.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,717.34 : 63,128.87 = 28,749.99 : x
  2. Step 2: Convert to fraction form
    45,717.34/63,128.87 = 28,749.99/x
  3. Step 3: Cross multiply
    45,717.34x = 63,128.87 × 28,749.99
  4. Step 4: Simplify right side
    45,717.34x = 1,814,954,381.21
  5. Step 5: Solve for x
    x = 1,814,954,381.21/45,717.34
  6. Step 6: Final answer
    x = 39,699.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.