Home / 111,585.16-153,987.78-61,287.40

Finding the Fourth Proportional to 111,585.16, 153,987.78 and 61,287.40

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Solution

The fourth proportional to 111,585.16, 153,987.78 and 61,287.40 is: 84,576.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,585.16 : 153,987.78 = 61,287.40 : x
  2. Step 2: Convert to fraction form
    111,585.16/153,987.78 = 61,287.40/x
  3. Step 3: Cross multiply
    111,585.16x = 153,987.78 × 61,287.40
  4. Step 4: Simplify right side
    111,585.16x = 9,437,510,667.97
  5. Step 5: Solve for x
    x = 9,437,510,667.97/111,585.16
  6. Step 6: Final answer
    x = 84,576.75

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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.