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Finding the Fourth Proportional to 103,080.16, 154,571.32 and 39,929.88

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Solution

The fourth proportional to 103,080.16, 154,571.32 and 39,929.88 is: 59,875.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,080.16 : 154,571.32 = 39,929.88 : x
  2. Step 2: Convert to fraction form
    103,080.16/154,571.32 = 39,929.88/x
  3. Step 3: Cross multiply
    103,080.16x = 154,571.32 × 39,929.88
  4. Step 4: Simplify right side
    103,080.16x = 6,172,014,259.04
  5. Step 5: Solve for x
    x = 6,172,014,259.04/103,080.16
  6. Step 6: Final answer
    x = 59,875.87

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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.