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Finding the Fourth Proportional to 111,686.16, 154,127.40 and 61,388.40

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Solution

The fourth proportional to 111,686.16, 154,127.40 and 61,388.40 is: 84,716.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,686.16 : 154,127.40 = 61,388.40 : x
  2. Step 2: Convert to fraction form
    111,686.16/154,127.40 = 61,388.40/x
  3. Step 3: Cross multiply
    111,686.16x = 154,127.40 × 61,388.40
  4. Step 4: Simplify right side
    111,686.16x = 9,461,634,482.16
  5. Step 5: Solve for x
    x = 9,461,634,482.16/111,686.16
  6. Step 6: Final answer
    x = 84,716.27

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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.