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Finding the Fourth Proportional to 128,807.60, 193,211.40 and 89,441.60

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Solution

The fourth proportional to 128,807.60, 193,211.40 and 89,441.60 is: 134,162.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,807.60 : 193,211.40 = 89,441.60 : x
  2. Step 2: Convert to fraction form
    128,807.60/193,211.40 = 89,441.60/x
  3. Step 3: Cross multiply
    128,807.60x = 193,211.40 × 89,441.60
  4. Step 4: Simplify right side
    128,807.60x = 17,281,136,754.24
  5. Step 5: Solve for x
    x = 17,281,136,754.24/128,807.60
  6. Step 6: Final answer
    x = 134,162.40

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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.