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Finding the Fourth Proportional to 43,447,978.40, 65,155,378.80 and 13,145,770.40

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Solution

The fourth proportional to 43,447,978.40, 65,155,378.80 and 13,145,770.40 is: 19,713,636.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,447,978.40 : 65,155,378.80 = 13,145,770.40 : x
  2. Step 2: Convert to fraction form
    43,447,978.40/65,155,378.80 = 13,145,770.40/x
  3. Step 3: Cross multiply
    43,447,978.40x = 65,155,378.80 × 13,145,770.40
  4. Step 4: Simplify right side
    43,447,978.40x = 856,517,650,029,827.50
  5. Step 5: Solve for x
    x = 856,517,650,029,827.50/43,447,978.40
  6. Step 6: Final answer
    x = 19,713,636.44

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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.