Home / 84,610.20-126,915.58-21,430.30

Finding the Fourth Proportional to 84,610.20, 126,915.58 and 21,430.30

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Solution

The fourth proportional to 84,610.20, 126,915.58 and 21,430.30 is: 32,145.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,610.20 : 126,915.58 = 21,430.30 : x
  2. Step 2: Convert to fraction form
    84,610.20/126,915.58 = 21,430.30/x
  3. Step 3: Cross multiply
    84,610.20x = 126,915.58 × 21,430.30
  4. Step 4: Simplify right side
    84,610.20x = 2,719,838,954.07
  5. Step 5: Solve for x
    x = 2,719,838,954.07/84,610.20
  6. Step 6: Final answer
    x = 32,145.52

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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.