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Finding the Fourth Proportional to 265,872.34, 398,885.73 and 85,953.93

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Solution

The fourth proportional to 265,872.34, 398,885.73 and 85,953.93 is: 128,955.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,872.34 : 398,885.73 = 85,953.93 : x
  2. Step 2: Convert to fraction form
    265,872.34/398,885.73 = 85,953.93/x
  3. Step 3: Cross multiply
    265,872.34x = 398,885.73 × 85,953.93
  4. Step 4: Simplify right side
    265,872.34x = 34,285,796,114.42
  5. Step 5: Solve for x
    x = 34,285,796,114.42/265,872.34
  6. Step 6: Final answer
    x = 128,955.86

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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.