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Finding the Fourth Proportional to 111,585.66, 153,988.47 and 61,287.90

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Solution

The fourth proportional to 111,585.66, 153,988.47 and 61,287.90 is: 84,577.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,585.66 : 153,988.47 = 61,287.90 : x
  2. Step 2: Convert to fraction form
    111,585.66/153,988.47 = 61,287.90/x
  3. Step 3: Cross multiply
    111,585.66x = 153,988.47 × 61,287.90
  4. Step 4: Simplify right side
    111,585.66x = 9,437,629,950.51
  5. Step 5: Solve for x
    x = 9,437,629,950.51/111,585.66
  6. Step 6: Final answer
    x = 84,577.44

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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.