Home / 85,427.34-128,170.17-47,942.70

Finding the Fourth Proportional to 85,427.34, 128,170.17 and 47,942.70

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Solution

The fourth proportional to 85,427.34, 128,170.17 and 47,942.70 is: 71,930.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.34 : 128,170.17 = 47,942.70 : x
  2. Step 2: Convert to fraction form
    85,427.34/128,170.17 = 47,942.70/x
  3. Step 3: Cross multiply
    85,427.34x = 128,170.17 × 47,942.70
  4. Step 4: Simplify right side
    85,427.34x = 6,144,824,009.26
  5. Step 5: Solve for x
    x = 6,144,824,009.26/85,427.34
  6. Step 6: Final answer
    x = 71,930.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.