Home / 142,085.22-196,063.64-78,418.91

Finding the Fourth Proportional to 142,085.22, 196,063.64 and 78,418.91

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Solution

The fourth proportional to 142,085.22, 196,063.64 and 78,418.91 is: 108,210.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,085.22 : 196,063.64 = 78,418.91 : x
  2. Step 2: Convert to fraction form
    142,085.22/196,063.64 = 78,418.91/x
  3. Step 3: Cross multiply
    142,085.22x = 196,063.64 × 78,418.91
  4. Step 4: Simplify right side
    142,085.22x = 15,375,097,037.50
  5. Step 5: Solve for x
    x = 15,375,097,037.50/142,085.22
  6. Step 6: Final answer
    x = 108,210.39

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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.