Home / 105,409.05-145,463.31-57,661.83

Finding the Fourth Proportional to 105,409.05, 145,463.31 and 57,661.83

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Solution

The fourth proportional to 105,409.05, 145,463.31 and 57,661.83 is: 79,572.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,409.05 : 145,463.31 = 57,661.83 : x
  2. Step 2: Convert to fraction form
    105,409.05/145,463.31 = 57,661.83/x
  3. Step 3: Cross multiply
    105,409.05x = 145,463.31 × 57,661.83
  4. Step 4: Simplify right side
    105,409.05x = 8,387,680,652.46
  5. Step 5: Solve for x
    x = 8,387,680,652.46/105,409.05
  6. Step 6: Final answer
    x = 79,572.68

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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.