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Finding the Fourth Proportional to 70,956,806.40, 106,435,209.60 and 19,838,743.20

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Solution

The fourth proportional to 70,956,806.40, 106,435,209.60 and 19,838,743.20 is: 29,758,114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956,806.40 : 106,435,209.60 = 19,838,743.20 : x
  2. Step 2: Convert to fraction form
    70,956,806.40/106,435,209.60 = 19,838,743.20/x
  3. Step 3: Cross multiply
    70,956,806.40x = 106,435,209.60 × 19,838,743.20
  4. Step 4: Simplify right side
    70,956,806.40x = 2,111,540,790,692,574.50
  5. Step 5: Solve for x
    x = 2,111,540,790,692,574.50/70,956,806.40
  6. Step 6: Final answer
    x = 29,758,114.80

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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.