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Finding the Fourth Proportional to 81,030.72, 111,828 and 45,227.71

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Solution

The fourth proportional to 81,030.72, 111,828 and 45,227.71 is: 62,417.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,030.72 : 111,828 = 45,227.71 : x
  2. Step 2: Convert to fraction form
    81,030.72/111,828 = 45,227.71/x
  3. Step 3: Cross multiply
    81,030.72x = 111,828 × 45,227.71
  4. Step 4: Simplify right side
    81,030.72x = 5,057,724,353.88
  5. Step 5: Solve for x
    x = 5,057,724,353.88/81,030.72
  6. Step 6: Final answer
    x = 62,417.37

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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.