Home / 105,486.91-145,572.15-57,743.31

Finding the Fourth Proportional to 105,486.91, 145,572.15 and 57,743.31

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Solution

The fourth proportional to 105,486.91, 145,572.15 and 57,743.31 is: 79,685.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,486.91 : 145,572.15 = 57,743.31 : x
  2. Step 2: Convert to fraction form
    105,486.91/145,572.15 = 57,743.31/x
  3. Step 3: Cross multiply
    105,486.91x = 145,572.15 × 57,743.31
  4. Step 4: Simplify right side
    105,486.91x = 8,405,817,056.96
  5. Step 5: Solve for x
    x = 8,405,817,056.96/105,486.91
  6. Step 6: Final answer
    x = 79,685.88

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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.