Home / 105,428.52-145,491.26-57,681.90

Finding the Fourth Proportional to 105,428.52, 145,491.26 and 57,681.90

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Solution

The fourth proportional to 105,428.52, 145,491.26 and 57,681.90 is: 79,600.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,428.52 : 145,491.26 = 57,681.90 : x
  2. Step 2: Convert to fraction form
    105,428.52/145,491.26 = 57,681.90/x
  3. Step 3: Cross multiply
    105,428.52x = 145,491.26 × 57,681.90
  4. Step 4: Simplify right side
    105,428.52x = 8,392,212,310.19
  5. Step 5: Solve for x
    x = 8,392,212,310.19/105,428.52
  6. Step 6: Final answer
    x = 79,600.97

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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.