Home / 85,915.23-128,720.40-35,885.26

Finding the Fourth Proportional to 85,915.23, 128,720.40 and 35,885.26

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Solution

The fourth proportional to 85,915.23, 128,720.40 and 35,885.26 is: 53,764.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915.23 : 128,720.40 = 35,885.26 : x
  2. Step 2: Convert to fraction form
    85,915.23/128,720.40 = 35,885.26/x
  3. Step 3: Cross multiply
    85,915.23x = 128,720.40 × 35,885.26
  4. Step 4: Simplify right side
    85,915.23x = 4,619,165,021.30
  5. Step 5: Solve for x
    x = 4,619,165,021.30/85,915.23
  6. Step 6: Final answer
    x = 53,764.22

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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.