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Finding the Fourth Proportional to 100,732.67, 139,008.15 and 55,410.64

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Solution

The fourth proportional to 100,732.67, 139,008.15 and 55,410.64 is: 76,465.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,732.67 : 139,008.15 = 55,410.64 : x
  2. Step 2: Convert to fraction form
    100,732.67/139,008.15 = 55,410.64/x
  3. Step 3: Cross multiply
    100,732.67x = 139,008.15 × 55,410.64
  4. Step 4: Simplify right side
    100,732.67x = 7,702,531,186.60
  5. Step 5: Solve for x
    x = 7,702,531,186.60/100,732.67
  6. Step 6: Final answer
    x = 76,465.08

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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.