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Finding the Fourth Proportional to 121,311.60, 181,967.40 and 115,868.40

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Solution

The fourth proportional to 121,311.60, 181,967.40 and 115,868.40 is: 173,802.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,311.60 : 181,967.40 = 115,868.40 : x
  2. Step 2: Convert to fraction form
    121,311.60/181,967.40 = 115,868.40/x
  3. Step 3: Cross multiply
    121,311.60x = 181,967.40 × 115,868.40
  4. Step 4: Simplify right side
    121,311.60x = 21,084,271,490.16
  5. Step 5: Solve for x
    x = 21,084,271,490.16/121,311.60
  6. Step 6: Final answer
    x = 173,802.60

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1.5x scale

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.