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Finding the Fourth Proportional to 51,369.76, 70,890.06 and 28,708.74

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Solution

The fourth proportional to 51,369.76, 70,890.06 and 28,708.74 is: 39,617.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,369.76 : 70,890.06 = 28,708.74 : x
  2. Step 2: Convert to fraction form
    51,369.76/70,890.06 = 28,708.74/x
  3. Step 3: Cross multiply
    51,369.76x = 70,890.06 × 28,708.74
  4. Step 4: Simplify right side
    51,369.76x = 2,035,164,301.12
  5. Step 5: Solve for x
    x = 2,035,164,301.12/51,369.76
  6. Step 6: Final answer
    x = 39,617.94

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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.