Home / 105,486.92-145,572.12-57,743.28

Finding the Fourth Proportional to 105,486.92, 145,572.12 and 57,743.28

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Solution

The fourth proportional to 105,486.92, 145,572.12 and 57,743.28 is: 79,685.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,486.92 : 145,572.12 = 57,743.28 : x
  2. Step 2: Convert to fraction form
    105,486.92/145,572.12 = 57,743.28/x
  3. Step 3: Cross multiply
    105,486.92x = 145,572.12 × 57,743.28
  4. Step 4: Simplify right side
    105,486.92x = 8,405,811,685.35
  5. Step 5: Solve for x
    x = 8,405,811,685.35/105,486.92
  6. Step 6: Final answer
    x = 79,685.82

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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.