Home / 128,558.12-192,681.66-66,194.60

Finding the Fourth Proportional to 128,558.12, 192,681.66 and 66,194.60

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Solution

The fourth proportional to 128,558.12, 192,681.66 and 66,194.60 is: 99,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,558.12 : 192,681.66 = 66,194.60 : x
  2. Step 2: Convert to fraction form
    128,558.12/192,681.66 = 66,194.60/x
  3. Step 3: Cross multiply
    128,558.12x = 192,681.66 × 66,194.60
  4. Step 4: Simplify right side
    128,558.12x = 12,754,485,411.04
  5. Step 5: Solve for x
    x = 12,754,485,411.04/128,558.12
  6. Step 6: Final answer
    x = 99,211.82

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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.