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Finding the Fourth Proportional to 142,243.48, 213,315.81 and 79,159.87

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Solution

The fourth proportional to 142,243.48, 213,315.81 and 79,159.87 is: 118,712.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,243.48 : 213,315.81 = 79,159.87 : x
  2. Step 2: Convert to fraction form
    142,243.48/213,315.81 = 79,159.87/x
  3. Step 3: Cross multiply
    142,243.48x = 213,315.81 × 79,159.87
  4. Step 4: Simplify right side
    142,243.48x = 16,886,051,788.54
  5. Step 5: Solve for x
    x = 16,886,051,788.54/142,243.48
  6. Step 6: Final answer
    x = 118,712.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.