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Finding the Fourth Proportional to 128,895.53, 193,341.15 and 52,978.68

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Solution

The fourth proportional to 128,895.53, 193,341.15 and 52,978.68 is: 79,467.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,895.53 : 193,341.15 = 52,978.68 : x
  2. Step 2: Convert to fraction form
    128,895.53/193,341.15 = 52,978.68/x
  3. Step 3: Cross multiply
    128,895.53x = 193,341.15 × 52,978.68
  4. Step 4: Simplify right side
    128,895.53x = 10,242,958,916.68
  5. Step 5: Solve for x
    x = 10,242,958,916.68/128,895.53
  6. Step 6: Final answer
    x = 79,467.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.