Home / 80,172.36-110,608.02-61,780.89

Finding the Fourth Proportional to 80,172.36, 110,608.02 and 61,780.89

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Solution

The fourth proportional to 80,172.36, 110,608.02 and 61,780.89 is: 85,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,172.36 : 110,608.02 = 61,780.89 : x
  2. Step 2: Convert to fraction form
    80,172.36/110,608.02 = 61,780.89/x
  3. Step 3: Cross multiply
    80,172.36x = 110,608.02 × 61,780.89
  4. Step 4: Simplify right side
    80,172.36x = 6,833,461,916.74
  5. Step 5: Solve for x
    x = 6,833,461,916.74/80,172.36
  6. Step 6: Final answer
    x = 85,234.64

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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.