Home / 85,636.06-128,418.96-25,643.40

Finding the Fourth Proportional to 85,636.06, 128,418.96 and 25,643.40

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Solution

The fourth proportional to 85,636.06, 128,418.96 and 25,643.40 is: 38,454.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,636.06 : 128,418.96 = 25,643.40 : x
  2. Step 2: Convert to fraction form
    85,636.06/128,418.96 = 25,643.40/x
  3. Step 3: Cross multiply
    85,636.06x = 128,418.96 × 25,643.40
  4. Step 4: Simplify right side
    85,636.06x = 3,293,098,116.77
  5. Step 5: Solve for x
    x = 3,293,098,116.77/85,636.06
  6. Step 6: Final answer
    x = 38,454.58

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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.