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Finding the Fourth Proportional to 216,412.80, 324,465.60 and 83,241.60

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Solution

The fourth proportional to 216,412.80, 324,465.60 and 83,241.60 is: 124,803.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,412.80 : 324,465.60 = 83,241.60 : x
  2. Step 2: Convert to fraction form
    216,412.80/324,465.60 = 83,241.60/x
  3. Step 3: Cross multiply
    216,412.80x = 324,465.60 × 83,241.60
  4. Step 4: Simplify right side
    216,412.80x = 27,009,035,688.96
  5. Step 5: Solve for x
    x = 27,009,035,688.96/216,412.80
  6. Step 6: Final answer
    x = 124,803.32

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1.5x scale

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.