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Finding the Fourth Proportional to 111,899.80, 154,421.32 and 61,598.80

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Solution

The fourth proportional to 111,899.80, 154,421.32 and 61,598.80 is: 85,006.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,899.80 : 154,421.32 = 61,598.80 : x
  2. Step 2: Convert to fraction form
    111,899.80/154,421.32 = 61,598.80/x
  3. Step 3: Cross multiply
    111,899.80x = 154,421.32 × 61,598.80
  4. Step 4: Simplify right side
    111,899.80x = 9,512,168,006.42
  5. Step 5: Solve for x
    x = 9,512,168,006.42/111,899.80
  6. Step 6: Final answer
    x = 85,006.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.