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Finding the Fourth Proportional to 51,266.48, 70,750.20 and 28,910

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Solution

The fourth proportional to 51,266.48, 70,750.20 and 28,910 is: 39,897.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,266.48 : 70,750.20 = 28,910 : x
  2. Step 2: Convert to fraction form
    51,266.48/70,750.20 = 28,910/x
  3. Step 3: Cross multiply
    51,266.48x = 70,750.20 × 28,910
  4. Step 4: Simplify right side
    51,266.48x = 2,045,388,282
  5. Step 5: Solve for x
    x = 2,045,388,282/51,266.48
  6. Step 6: Final answer
    x = 39,897.19

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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.