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Finding the Fourth Proportional to 144,078.60, 216,245.90 and 84,840.20

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Solution

The fourth proportional to 144,078.60, 216,245.90 and 84,840.20 is: 127,335.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,078.60 : 216,245.90 = 84,840.20 : x
  2. Step 2: Convert to fraction form
    144,078.60/216,245.90 = 84,840.20/x
  3. Step 3: Cross multiply
    144,078.60x = 216,245.90 × 84,840.20
  4. Step 4: Simplify right side
    144,078.60x = 18,346,345,405.18
  5. Step 5: Solve for x
    x = 18,346,345,405.18/144,078.60
  6. Step 6: Final answer
    x = 127,335.67

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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.