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Finding the Fourth Proportional to 100,348.40, 138,482.16 and 55,025.66

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Solution

The fourth proportional to 100,348.40, 138,482.16 and 55,025.66 is: 75,936.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,348.40 : 138,482.16 = 55,025.66 : x
  2. Step 2: Convert to fraction form
    100,348.40/138,482.16 = 55,025.66/x
  3. Step 3: Cross multiply
    100,348.40x = 138,482.16 × 55,025.66
  4. Step 4: Simplify right side
    100,348.40x = 7,620,072,252.23
  5. Step 5: Solve for x
    x = 7,620,072,252.23/100,348.40
  6. Step 6: Final answer
    x = 75,936.16

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1.5x scale

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.