Home / 142,052.80-196,028.16-78,390.64

Finding the Fourth Proportional to 142,052.80, 196,028.16 and 78,390.64

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Solution

The fourth proportional to 142,052.80, 196,028.16 and 78,390.64 is: 108,176.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,052.80 : 196,028.16 = 78,390.64 : x
  2. Step 2: Convert to fraction form
    142,052.80/196,028.16 = 78,390.64/x
  3. Step 3: Cross multiply
    142,052.80x = 196,028.16 × 78,390.64
  4. Step 4: Simplify right side
    142,052.80x = 15,366,772,920.42
  5. Step 5: Solve for x
    x = 15,366,772,920.42/142,052.80
  6. Step 6: Final answer
    x = 108,176.49

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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.