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Finding the Fourth Proportional to 111,509.71, 153,813.41 and 66,155.59

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Solution

The fourth proportional to 111,509.71, 153,813.41 and 66,155.59 is: 91,253.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,509.71 : 153,813.41 = 66,155.59 : x
  2. Step 2: Convert to fraction form
    111,509.71/153,813.41 = 66,155.59/x
  3. Step 3: Cross multiply
    111,509.71x = 153,813.41 × 66,155.59
  4. Step 4: Simplify right side
    111,509.71x = 10,175,616,888.46
  5. Step 5: Solve for x
    x = 10,175,616,888.46/111,509.71
  6. Step 6: Final answer
    x = 91,253.19

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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.