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Finding the Fourth Proportional to 243,078.76, 364,615.98 and 85,270.24

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Solution

The fourth proportional to 243,078.76, 364,615.98 and 85,270.24 is: 127,904.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,078.76 : 364,615.98 = 85,270.24 : x
  2. Step 2: Convert to fraction form
    243,078.76/364,615.98 = 85,270.24/x
  3. Step 3: Cross multiply
    243,078.76x = 364,615.98 × 85,270.24
  4. Step 4: Simplify right side
    243,078.76x = 31,090,892,122.44
  5. Step 5: Solve for x
    x = 31,090,892,122.44/243,078.76
  6. Step 6: Final answer
    x = 127,904.60

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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.