Home / 142,081.16-196,063.62-78,417.32

Finding the Fourth Proportional to 142,081.16, 196,063.62 and 78,417.32

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Solution

The fourth proportional to 142,081.16, 196,063.62 and 78,417.32 is: 108,211.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,081.16 : 196,063.62 = 78,417.32 : x
  2. Step 2: Convert to fraction form
    142,081.16/196,063.62 = 78,417.32/x
  3. Step 3: Cross multiply
    142,081.16x = 196,063.62 × 78,417.32
  4. Step 4: Simplify right side
    142,081.16x = 15,374,783,629.90
  5. Step 5: Solve for x
    x = 15,374,783,629.90/142,081.16
  6. Step 6: Final answer
    x = 108,211.28

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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.