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Finding the Fourth Proportional to 51,756.60, 71,430.07 and 28,788.71

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Solution

The fourth proportional to 51,756.60, 71,430.07 and 28,788.71 is: 39,731.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,756.60 : 71,430.07 = 28,788.71 : x
  2. Step 2: Convert to fraction form
    51,756.60/71,430.07 = 28,788.71/x
  3. Step 3: Cross multiply
    51,756.60x = 71,430.07 × 28,788.71
  4. Step 4: Simplify right side
    51,756.60x = 2,056,379,570.51
  5. Step 5: Solve for x
    x = 2,056,379,570.51/51,756.60
  6. Step 6: Final answer
    x = 39,731.74

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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.