Home / 142,390.87-196,503.35-78,730.94

Finding the Fourth Proportional to 142,390.87, 196,503.35 and 78,730.94

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Solution

The fourth proportional to 142,390.87, 196,503.35 and 78,730.94 is: 108,650.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,390.87 : 196,503.35 = 78,730.94 : x
  2. Step 2: Convert to fraction form
    142,390.87/196,503.35 = 78,730.94/x
  3. Step 3: Cross multiply
    142,390.87x = 196,503.35 × 78,730.94
  4. Step 4: Simplify right side
    142,390.87x = 15,470,893,556.25
  5. Step 5: Solve for x
    x = 15,470,893,556.25/142,390.87
  6. Step 6: Final answer
    x = 108,650.88

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1.5x scale

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.