Home / 131,485.60-197,228.40-81,881.20

Finding the Fourth Proportional to 131,485.60, 197,228.40 and 81,881.20

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Solution

The fourth proportional to 131,485.60, 197,228.40 and 81,881.20 is: 122,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,485.60 : 197,228.40 = 81,881.20 : x
  2. Step 2: Convert to fraction form
    131,485.60/197,228.40 = 81,881.20/x
  3. Step 3: Cross multiply
    131,485.60x = 197,228.40 × 81,881.20
  4. Step 4: Simplify right side
    131,485.60x = 16,149,298,066.08
  5. Step 5: Solve for x
    x = 16,149,298,066.08/131,485.60
  6. Step 6: Final answer
    x = 122,821.80

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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.