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Finding the Fourth Proportional to 66,742,599.20, 100,113,898.80 and 28,394,477.60

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Solution

The fourth proportional to 66,742,599.20, 100,113,898.80 and 28,394,477.60 is: 42,591,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,742,599.20 : 100,113,898.80 = 28,394,477.60 : x
  2. Step 2: Convert to fraction form
    66,742,599.20/100,113,898.80 = 28,394,477.60/x
  3. Step 3: Cross multiply
    66,742,599.20x = 100,113,898.80 × 28,394,477.60
  4. Step 4: Simplify right side
    66,742,599.20x = 2,842,681,856,925,267
  5. Step 5: Solve for x
    x = 2,842,681,856,925,267/66,742,599.20
  6. Step 6: Final answer
    x = 42,591,716.40

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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.