Home / 142,815.77-197,081.62-78,283.67

Finding the Fourth Proportional to 142,815.77, 197,081.62 and 78,283.67

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Solution

The fourth proportional to 142,815.77, 197,081.62 and 78,283.67 is: 108,029.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,815.77 : 197,081.62 = 78,283.67 : x
  2. Step 2: Convert to fraction form
    142,815.77/197,081.62 = 78,283.67/x
  3. Step 3: Cross multiply
    142,815.77x = 197,081.62 × 78,283.67
  4. Step 4: Simplify right side
    142,815.77x = 15,428,271,432.12
  5. Step 5: Solve for x
    x = 15,428,271,432.12/142,815.77
  6. Step 6: Final answer
    x = 108,029.19

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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.