Home / 142,106.85-196,103.57-78,440.04

Finding the Fourth Proportional to 142,106.85, 196,103.57 and 78,440.04

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Solution

The fourth proportional to 142,106.85, 196,103.57 and 78,440.04 is: 108,245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,106.85 : 196,103.57 = 78,440.04 : x
  2. Step 2: Convert to fraction form
    142,106.85/196,103.57 = 78,440.04/x
  3. Step 3: Cross multiply
    142,106.85x = 196,103.57 × 78,440.04
  4. Step 4: Simplify right side
    142,106.85x = 15,382,371,482.74
  5. Step 5: Solve for x
    x = 15,382,371,482.74/142,106.85
  6. Step 6: Final answer
    x = 108,245.11

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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.