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Finding the Fourth Proportional to 85,603.58, 128,335.78 and 35,720.83

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Solution

The fourth proportional to 85,603.58, 128,335.78 and 35,720.83 is: 53,552.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.58 : 128,335.78 = 35,720.83 : x
  2. Step 2: Convert to fraction form
    85,603.58/128,335.78 = 35,720.83/x
  3. Step 3: Cross multiply
    85,603.58x = 128,335.78 × 35,720.83
  4. Step 4: Simplify right side
    85,603.58x = 4,584,260,580.30
  5. Step 5: Solve for x
    x = 4,584,260,580.30/85,603.58
  6. Step 6: Final answer
    x = 53,552.21

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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.