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Finding the Fourth Proportional to 111,984, 154,541.16 and 61,686.24

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Solution

The fourth proportional to 111,984, 154,541.16 and 61,686.24 is: 85,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,984 : 154,541.16 = 61,686.24 : x
  2. Step 2: Convert to fraction form
    111,984/154,541.16 = 61,686.24/x
  3. Step 3: Cross multiply
    111,984x = 154,541.16 × 61,686.24
  4. Step 4: Simplify right side
    111,984x = 9,533,063,085.64
  5. Step 5: Solve for x
    x = 9,533,063,085.64/111,984
  6. Step 6: Final answer
    x = 85,128.80

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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.