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Finding the Fourth Proportional to 111,591.12, 153,995.74 and 61,290.12

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Solution

The fourth proportional to 111,591.12, 153,995.74 and 61,290.12 is: 84,580.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,591.12 : 153,995.74 = 61,290.12 : x
  2. Step 2: Convert to fraction form
    111,591.12/153,995.74 = 61,290.12/x
  3. Step 3: Cross multiply
    111,591.12x = 153,995.74 × 61,290.12
  4. Step 4: Simplify right side
    111,591.12x = 9,438,417,384.09
  5. Step 5: Solve for x
    x = 9,438,417,384.09/111,591.12
  6. Step 6: Final answer
    x = 84,580.36

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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.