Home / 105,431.51-145,481.11-62,981.03

Finding the Fourth Proportional to 105,431.51, 145,481.11 and 62,981.03

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Solution

The fourth proportional to 105,431.51, 145,481.11 and 62,981.03 is: 86,905.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,431.51 : 145,481.11 = 62,981.03 : x
  2. Step 2: Convert to fraction form
    105,431.51/145,481.11 = 62,981.03/x
  3. Step 3: Cross multiply
    105,431.51x = 145,481.11 × 62,981.03
  4. Step 4: Simplify right side
    105,431.51x = 9,162,550,153.34
  5. Step 5: Solve for x
    x = 9,162,550,153.34/105,431.51
  6. Step 6: Final answer
    x = 86,905.24

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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.