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Finding the Fourth Proportional to 85,681.55, 128,519.12 and 22,501.10

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Solution

The fourth proportional to 85,681.55, 128,519.12 and 22,501.10 is: 33,750.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,681.55 : 128,519.12 = 22,501.10 : x
  2. Step 2: Convert to fraction form
    85,681.55/128,519.12 = 22,501.10/x
  3. Step 3: Cross multiply
    85,681.55x = 128,519.12 × 22,501.10
  4. Step 4: Simplify right side
    85,681.55x = 2,891,820,815.93
  5. Step 5: Solve for x
    x = 2,891,820,815.93/85,681.55
  6. Step 6: Final answer
    x = 33,750.80

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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.