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Finding the Fourth Proportional to 76,916.40, 115,374.60 and 73,570.80

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Solution

The fourth proportional to 76,916.40, 115,374.60 and 73,570.80 is: 110,356.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,916.40 : 115,374.60 = 73,570.80 : x
  2. Step 2: Convert to fraction form
    76,916.40/115,374.60 = 73,570.80/x
  3. Step 3: Cross multiply
    76,916.40x = 115,374.60 × 73,570.80
  4. Step 4: Simplify right side
    76,916.40x = 8,488,201,621.68
  5. Step 5: Solve for x
    x = 8,488,201,621.68/76,916.40
  6. Step 6: Final answer
    x = 110,356.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.