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Finding the Fourth Proportional to 100,341.60, 138,477.62 and 55,629.60

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Solution

The fourth proportional to 100,341.60, 138,477.62 and 55,629.60 is: 76,772.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,341.60 : 138,477.62 = 55,629.60 : x
  2. Step 2: Convert to fraction form
    100,341.60/138,477.62 = 55,629.60/x
  3. Step 3: Cross multiply
    100,341.60x = 138,477.62 × 55,629.60
  4. Step 4: Simplify right side
    100,341.60x = 7,703,454,609.55
  5. Step 5: Solve for x
    x = 7,703,454,609.55/100,341.60
  6. Step 6: Final answer
    x = 76,772.29

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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.