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Finding the Fourth Proportional to 85,636.80, 128,467.50 and 26,477.08

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Solution

The fourth proportional to 85,636.80, 128,467.50 and 26,477.08 is: 39,719.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,636.80 : 128,467.50 = 26,477.08 : x
  2. Step 2: Convert to fraction form
    85,636.80/128,467.50 = 26,477.08/x
  3. Step 3: Cross multiply
    85,636.80x = 128,467.50 × 26,477.08
  4. Step 4: Simplify right side
    85,636.80x = 3,401,444,274.90
  5. Step 5: Solve for x
    x = 3,401,444,274.90/85,636.80
  6. Step 6: Final answer
    x = 39,719.42

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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.