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Finding the Fourth Proportional to 116,412.80, 174,878.40 and 111,689.60

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Solution

The fourth proportional to 116,412.80, 174,878.40 and 111,689.60 is: 167,783.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,412.80 : 174,878.40 = 111,689.60 : x
  2. Step 2: Convert to fraction form
    116,412.80/174,878.40 = 111,689.60/x
  3. Step 3: Cross multiply
    116,412.80x = 174,878.40 × 111,689.60
  4. Step 4: Simplify right side
    116,412.80x = 19,532,098,544.64
  5. Step 5: Solve for x
    x = 19,532,098,544.64/116,412.80
  6. Step 6: Final answer
    x = 167,783.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.