Home / 84,305.66-126,455.45-21,126.29

Finding the Fourth Proportional to 84,305.66, 126,455.45 and 21,126.29

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Solution

The fourth proportional to 84,305.66, 126,455.45 and 21,126.29 is: 31,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,305.66 : 126,455.45 = 21,126.29 : x
  2. Step 2: Convert to fraction form
    84,305.66/126,455.45 = 21,126.29/x
  3. Step 3: Cross multiply
    84,305.66x = 126,455.45 × 21,126.29
  4. Step 4: Simplify right side
    84,305.66x = 2,671,533,770.87
  5. Step 5: Solve for x
    x = 2,671,533,770.87/84,305.66
  6. Step 6: Final answer
    x = 31,688.67

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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.