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Finding the Fourth Proportional to 92,668,420.80, 139,068,986.40 and 38,854,353.60

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Solution

The fourth proportional to 92,668,420.80, 139,068,986.40 and 38,854,353.60 is: 58,309,352.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,668,420.80 : 139,068,986.40 = 38,854,353.60 : x
  2. Step 2: Convert to fraction form
    92,668,420.80/139,068,986.40 = 38,854,353.60/x
  3. Step 3: Cross multiply
    92,668,420.80x = 139,068,986.40 × 38,854,353.60
  4. Step 4: Simplify right side
    92,668,420.80x = 5,403,435,572,379,191
  5. Step 5: Solve for x
    x = 5,403,435,572,379,191/92,668,420.80
  6. Step 6: Final answer
    x = 58,309,352.05

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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.