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Finding the Fourth Proportional to 81,602.40, 122,403.60 and 29,017.20

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Solution

The fourth proportional to 81,602.40, 122,403.60 and 29,017.20 is: 43,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,602.40 : 122,403.60 = 29,017.20 : x
  2. Step 2: Convert to fraction form
    81,602.40/122,403.60 = 29,017.20/x
  3. Step 3: Cross multiply
    81,602.40x = 122,403.60 × 29,017.20
  4. Step 4: Simplify right side
    81,602.40x = 3,551,809,741.92
  5. Step 5: Solve for x
    x = 3,551,809,741.92/81,602.40
  6. Step 6: Final answer
    x = 43,525.80

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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.