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Finding the Fourth Proportional to 51,991.30, 71,747.76 and 28,117.99

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Solution

The fourth proportional to 51,991.30, 71,747.76 and 28,117.99 is: 38,802.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,991.30 : 71,747.76 = 28,117.99 : x
  2. Step 2: Convert to fraction form
    51,991.30/71,747.76 = 28,117.99/x
  3. Step 3: Cross multiply
    51,991.30x = 71,747.76 × 28,117.99
  4. Step 4: Simplify right side
    51,991.30x = 2,017,402,798.20
  5. Step 5: Solve for x
    x = 2,017,402,798.20/51,991.30
  6. Step 6: Final answer
    x = 38,802.70

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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.