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Finding the Fourth Proportional to 81,368.55, 122,034.60 and 53,484.30

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Solution

The fourth proportional to 81,368.55, 122,034.60 and 53,484.30 is: 80,214.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,368.55 : 122,034.60 = 53,484.30 : x
  2. Step 2: Convert to fraction form
    81,368.55/122,034.60 = 53,484.30/x
  3. Step 3: Cross multiply
    81,368.55x = 122,034.60 × 53,484.30
  4. Step 4: Simplify right side
    81,368.55x = 6,526,935,156.78
  5. Step 5: Solve for x
    x = 6,526,935,156.78/81,368.55
  6. Step 6: Final answer
    x = 80,214.47

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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.