Home / 142,130.09-196,140.99-78,467.74

Finding the Fourth Proportional to 142,130.09, 196,140.99 and 78,467.74

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Solution

The fourth proportional to 142,130.09, 196,140.99 and 78,467.74 is: 108,286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,130.09 : 196,140.99 = 78,467.74 : x
  2. Step 2: Convert to fraction form
    142,130.09/196,140.99 = 78,467.74/x
  3. Step 3: Cross multiply
    142,130.09x = 196,140.99 × 78,467.74
  4. Step 4: Simplify right side
    142,130.09x = 15,390,740,010.56
  5. Step 5: Solve for x
    x = 15,390,740,010.56/142,130.09
  6. Step 6: Final answer
    x = 108,286.29

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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.