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Finding the Fourth Proportional to 85,907.39, 128,911.30 and 35,983.24

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Solution

The fourth proportional to 85,907.39, 128,911.30 and 35,983.24 is: 53,995.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,907.39 : 128,911.30 = 35,983.24 : x
  2. Step 2: Convert to fraction form
    85,907.39/128,911.30 = 35,983.24/x
  3. Step 3: Cross multiply
    85,907.39x = 128,911.30 × 35,983.24
  4. Step 4: Simplify right side
    85,907.39x = 4,638,645,834.38
  5. Step 5: Solve for x
    x = 4,638,645,834.38/85,907.39
  6. Step 6: Final answer
    x = 53,995.89

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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.