Home / 84,150.36-126,225-20,970.12

Finding the Fourth Proportional to 84,150.36, 126,225 and 20,970.12

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Solution

The fourth proportional to 84,150.36, 126,225 and 20,970.12 is: 31,455.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,150.36 : 126,225 = 20,970.12 : x
  2. Step 2: Convert to fraction form
    84,150.36/126,225 = 20,970.12/x
  3. Step 3: Cross multiply
    84,150.36x = 126,225 × 20,970.12
  4. Step 4: Simplify right side
    84,150.36x = 2,646,953,397
  5. Step 5: Solve for x
    x = 2,646,953,397/84,150.36
  6. Step 6: Final answer
    x = 31,455.05

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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.