Home / 123,512.13-170,427.36-71,840.67

Finding the Fourth Proportional to 123,512.13, 170,427.36 and 71,840.67

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Solution

The fourth proportional to 123,512.13, 170,427.36 and 71,840.67 is: 99,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,512.13 : 170,427.36 = 71,840.67 : x
  2. Step 2: Convert to fraction form
    123,512.13/170,427.36 = 71,840.67/x
  3. Step 3: Cross multiply
    123,512.13x = 170,427.36 × 71,840.67
  4. Step 4: Simplify right side
    123,512.13x = 12,243,615,728.73
  5. Step 5: Solve for x
    x = 12,243,615,728.73/123,512.13
  6. Step 6: Final answer
    x = 99,128.85

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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.