Home / 142,117.07-196,121.52-78,454.85

Finding the Fourth Proportional to 142,117.07, 196,121.52 and 78,454.85

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Solution

The fourth proportional to 142,117.07, 196,121.52 and 78,454.85 is: 108,267.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,117.07 : 196,121.52 = 78,454.85 : x
  2. Step 2: Convert to fraction form
    142,117.07/196,121.52 = 78,454.85/x
  3. Step 3: Cross multiply
    142,117.07x = 196,121.52 × 78,454.85
  4. Step 4: Simplify right side
    142,117.07x = 15,386,683,452.76
  5. Step 5: Solve for x
    x = 15,386,683,452.76/142,117.07
  6. Step 6: Final answer
    x = 108,267.67

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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.