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Finding the Fourth Proportional to 56,679,205.60, 85,025,709.60 and 20,291,413.60

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Solution

The fourth proportional to 56,679,205.60, 85,025,709.60 and 20,291,413.60 is: 30,439,591.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,679,205.60 : 85,025,709.60 = 20,291,413.60 : x
  2. Step 2: Convert to fraction form
    56,679,205.60/85,025,709.60 = 20,291,413.60/x
  3. Step 3: Cross multiply
    56,679,205.60x = 85,025,709.60 × 20,291,413.60
  4. Step 4: Simplify right side
    56,679,205.60x = 1,725,291,840,127,090.50
  5. Step 5: Solve for x
    x = 1,725,291,840,127,090.50/56,679,205.60
  6. Step 6: Final answer
    x = 30,439,591.06

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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.