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Finding the Fourth Proportional to 100,483.96, 138,669.64 and 55,166.20

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Solution

The fourth proportional to 100,483.96, 138,669.64 and 55,166.20 is: 76,130.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,483.96 : 138,669.64 = 55,166.20 : x
  2. Step 2: Convert to fraction form
    100,483.96/138,669.64 = 55,166.20/x
  3. Step 3: Cross multiply
    100,483.96x = 138,669.64 × 55,166.20
  4. Step 4: Simplify right side
    100,483.96x = 7,649,877,094.17
  5. Step 5: Solve for x
    x = 7,649,877,094.17/100,483.96
  6. Step 6: Final answer
    x = 76,130.33

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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.