Home / 85,817.10-128,725.65-74,007.30

Finding the Fourth Proportional to 85,817.10, 128,725.65 and 74,007.30

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Solution

The fourth proportional to 85,817.10, 128,725.65 and 74,007.30 is: 111,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,817.10 : 128,725.65 = 74,007.30 : x
  2. Step 2: Convert to fraction form
    85,817.10/128,725.65 = 74,007.30/x
  3. Step 3: Cross multiply
    85,817.10x = 128,725.65 × 74,007.30
  4. Step 4: Simplify right side
    85,817.10x = 9,526,637,797.25
  5. Step 5: Solve for x
    x = 9,526,637,797.25/85,817.10
  6. Step 6: Final answer
    x = 111,010.95

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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.