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Finding the Fourth Proportional to 56,496.80, 84,745.20 and 47,280.80

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Solution

The fourth proportional to 56,496.80, 84,745.20 and 47,280.80 is: 70,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,496.80 : 84,745.20 = 47,280.80 : x
  2. Step 2: Convert to fraction form
    56,496.80/84,745.20 = 47,280.80/x
  3. Step 3: Cross multiply
    56,496.80x = 84,745.20 × 47,280.80
  4. Step 4: Simplify right side
    56,496.80x = 4,006,820,852.16
  5. Step 5: Solve for x
    x = 4,006,820,852.16/56,496.80
  6. Step 6: Final answer
    x = 70,921.20

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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.