Home / 105,688.28-145,849.05-57,940.80

Finding the Fourth Proportional to 105,688.28, 145,849.05 and 57,940.80

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Solution

The fourth proportional to 105,688.28, 145,849.05 and 57,940.80 is: 79,957.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,688.28 : 145,849.05 = 57,940.80 : x
  2. Step 2: Convert to fraction form
    105,688.28/145,849.05 = 57,940.80/x
  3. Step 3: Cross multiply
    105,688.28x = 145,849.05 × 57,940.80
  4. Step 4: Simplify right side
    105,688.28x = 8,450,610,636.24
  5. Step 5: Solve for x
    x = 8,450,610,636.24/105,688.28
  6. Step 6: Final answer
    x = 79,957.88

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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.