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Finding the Fourth Proportional to 265,740.42, 398,661.93 and 85,874.25

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Solution

The fourth proportional to 265,740.42, 398,661.93 and 85,874.25 is: 128,827.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,740.42 : 398,661.93 = 85,874.25 : x
  2. Step 2: Convert to fraction form
    265,740.42/398,661.93 = 85,874.25/x
  3. Step 3: Cross multiply
    265,740.42x = 398,661.93 × 85,874.25
  4. Step 4: Simplify right side
    265,740.42x = 34,234,794,242.30
  5. Step 5: Solve for x
    x = 34,234,794,242.30/265,740.42
  6. Step 6: Final answer
    x = 128,827.95

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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.