Home / 128,025.60-191,584.80-111,566.40

Finding the Fourth Proportional to 128,025.60, 191,584.80 and 111,566.40

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Solution

The fourth proportional to 128,025.60, 191,584.80 and 111,566.40 is: 166,954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,025.60 : 191,584.80 = 111,566.40 : x
  2. Step 2: Convert to fraction form
    128,025.60/191,584.80 = 111,566.40/x
  3. Step 3: Cross multiply
    128,025.60x = 191,584.80 × 111,566.40
  4. Step 4: Simplify right side
    128,025.60x = 21,374,426,430.72
  5. Step 5: Solve for x
    x = 21,374,426,430.72/128,025.60
  6. Step 6: Final answer
    x = 166,954.32

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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.