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Finding the Fourth Proportional to 76,916.40, 115,250.40 and 43,537.20

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Solution

The fourth proportional to 76,916.40, 115,250.40 and 43,537.20 is: 65,235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,916.40 : 115,250.40 = 43,537.20 : x
  2. Step 2: Convert to fraction form
    76,916.40/115,250.40 = 43,537.20/x
  3. Step 3: Cross multiply
    76,916.40x = 115,250.40 × 43,537.20
  4. Step 4: Simplify right side
    76,916.40x = 5,017,679,714.88
  5. Step 5: Solve for x
    x = 5,017,679,714.88/76,916.40
  6. Step 6: Final answer
    x = 65,235.50

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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.