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Finding the Fourth Proportional to 78,546.40, 117,819.60 and 70,017.10

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Solution

The fourth proportional to 78,546.40, 117,819.60 and 70,017.10 is: 105,025.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,546.40 : 117,819.60 = 70,017.10 : x
  2. Step 2: Convert to fraction form
    78,546.40/117,819.60 = 70,017.10/x
  3. Step 3: Cross multiply
    78,546.40x = 117,819.60 × 70,017.10
  4. Step 4: Simplify right side
    78,546.40x = 8,249,386,715.16
  5. Step 5: Solve for x
    x = 8,249,386,715.16/78,546.40
  6. Step 6: Final answer
    x = 105,025.65

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Similar ratio
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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.