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Finding the Fourth Proportional to 85,907.63, 128,861.62 and 35,271.41

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Solution

The fourth proportional to 85,907.63, 128,861.62 and 35,271.41 is: 52,907.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,907.63 : 128,861.62 = 35,271.41 : x
  2. Step 2: Convert to fraction form
    85,907.63/128,861.62 = 35,271.41/x
  3. Step 3: Cross multiply
    85,907.63x = 128,861.62 × 35,271.41
  4. Step 4: Simplify right side
    85,907.63x = 4,545,130,299.80
  5. Step 5: Solve for x
    x = 4,545,130,299.80/85,907.63
  6. Step 6: Final answer
    x = 52,907.18

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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.