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Finding the Fourth Proportional to 98,491.74, 135,918.39 and 53,779.74

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Solution

The fourth proportional to 98,491.74, 135,918.39 and 53,779.74 is: 74,215.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,491.74 : 135,918.39 = 53,779.74 : x
  2. Step 2: Convert to fraction form
    98,491.74/135,918.39 = 53,779.74/x
  3. Step 3: Cross multiply
    98,491.74x = 135,918.39 × 53,779.74
  4. Step 4: Simplify right side
    98,491.74x = 7,309,655,675.42
  5. Step 5: Solve for x
    x = 7,309,655,675.42/98,491.74
  6. Step 6: Final answer
    x = 74,215.93

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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.