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Finding the Fourth Proportional to 220,953.60, 331,430.40 and 136,972.80

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Solution

The fourth proportional to 220,953.60, 331,430.40 and 136,972.80 is: 205,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,953.60 : 331,430.40 = 136,972.80 : x
  2. Step 2: Convert to fraction form
    220,953.60/331,430.40 = 136,972.80/x
  3. Step 3: Cross multiply
    220,953.60x = 331,430.40 × 136,972.80
  4. Step 4: Simplify right side
    220,953.60x = 45,396,949,893.12
  5. Step 5: Solve for x
    x = 45,396,949,893.12/220,953.60
  6. Step 6: Final answer
    x = 205,459.20

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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.