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Finding the Fourth Proportional to 104,978.08, 144,872.51 and 64,718.45

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Solution

The fourth proportional to 104,978.08, 144,872.51 and 64,718.45 is: 89,313.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,978.08 : 144,872.51 = 64,718.45 : x
  2. Step 2: Convert to fraction form
    104,978.08/144,872.51 = 64,718.45/x
  3. Step 3: Cross multiply
    104,978.08x = 144,872.51 × 64,718.45
  4. Step 4: Simplify right side
    104,978.08x = 9,375,923,246.85
  5. Step 5: Solve for x
    x = 9,375,923,246.85/104,978.08
  6. Step 6: Final answer
    x = 89,313.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.