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Finding the Fourth Proportional to 100,671.52, 138,919.54 and 55,348.33

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Solution

The fourth proportional to 100,671.52, 138,919.54 and 55,348.33 is: 76,376.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,671.52 : 138,919.54 = 55,348.33 : x
  2. Step 2: Convert to fraction form
    100,671.52/138,919.54 = 55,348.33/x
  3. Step 3: Cross multiply
    100,671.52x = 138,919.54 × 55,348.33
  4. Step 4: Simplify right side
    100,671.52x = 7,688,963,710.40
  5. Step 5: Solve for x
    x = 7,688,963,710.40/100,671.52
  6. Step 6: Final answer
    x = 76,376.76

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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.