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Finding the Fourth Proportional to 85,674.80, 128,513.16 and 35,762.48

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Solution

The fourth proportional to 85,674.80, 128,513.16 and 35,762.48 is: 53,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,674.80 : 128,513.16 = 35,762.48 : x
  2. Step 2: Convert to fraction form
    85,674.80/128,513.16 = 35,762.48/x
  3. Step 3: Cross multiply
    85,674.80x = 128,513.16 × 35,762.48
  4. Step 4: Simplify right side
    85,674.80x = 4,595,949,314.24
  5. Step 5: Solve for x
    x = 4,595,949,314.24/85,674.80
  6. Step 6: Final answer
    x = 53,644.12

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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.