Home / 101,429.89-139,926.08-65,631.42

Finding the Fourth Proportional to 101,429.89, 139,926.08 and 65,631.42

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Solution

The fourth proportional to 101,429.89, 139,926.08 and 65,631.42 is: 90,540.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,429.89 : 139,926.08 = 65,631.42 : x
  2. Step 2: Convert to fraction form
    101,429.89/139,926.08 = 65,631.42/x
  3. Step 3: Cross multiply
    101,429.89x = 139,926.08 × 65,631.42
  4. Step 4: Simplify right side
    101,429.89x = 9,183,547,489.51
  5. Step 5: Solve for x
    x = 9,183,547,489.51/101,429.89
  6. Step 6: Final answer
    x = 90,540.84

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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.