Home / 128,706.45-177,616.08-71,346.39

Finding the Fourth Proportional to 128,706.45, 177,616.08 and 71,346.39

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Solution

The fourth proportional to 128,706.45, 177,616.08 and 71,346.39 is: 98,458.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,706.45 : 177,616.08 = 71,346.39 : x
  2. Step 2: Convert to fraction form
    128,706.45/177,616.08 = 71,346.39/x
  3. Step 3: Cross multiply
    128,706.45x = 177,616.08 × 71,346.39
  4. Step 4: Simplify right side
    128,706.45x = 12,672,266,113.95
  5. Step 5: Solve for x
    x = 12,672,266,113.95/128,706.45
  6. Step 6: Final answer
    x = 98,458.67

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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.