Home / 85,743.17-128,633.55-28,815.03

Finding the Fourth Proportional to 85,743.17, 128,633.55 and 28,815.03

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Solution

The fourth proportional to 85,743.17, 128,633.55 and 28,815.03 is: 43,228.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,743.17 : 128,633.55 = 28,815.03 : x
  2. Step 2: Convert to fraction form
    85,743.17/128,633.55 = 28,815.03/x
  3. Step 3: Cross multiply
    85,743.17x = 128,633.55 × 28,815.03
  4. Step 4: Simplify right side
    85,743.17x = 3,706,579,602.26
  5. Step 5: Solve for x
    x = 3,706,579,602.26/85,743.17
  6. Step 6: Final answer
    x = 43,228.86

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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.