Home / 105,428.68-145,495.04-57,680.94

Finding the Fourth Proportional to 105,428.68, 145,495.04 and 57,680.94

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Solution

The fourth proportional to 105,428.68, 145,495.04 and 57,680.94 is: 79,601.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,428.68 : 145,495.04 = 57,680.94 : x
  2. Step 2: Convert to fraction form
    105,428.68/145,495.04 = 57,680.94/x
  3. Step 3: Cross multiply
    105,428.68x = 145,495.04 × 57,680.94
  4. Step 4: Simplify right side
    105,428.68x = 8,392,290,672.54
  5. Step 5: Solve for x
    x = 8,392,290,672.54/105,428.68
  6. Step 6: Final answer
    x = 79,601.59

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1.5x scale

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.