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Finding the Fourth Proportional to 134,807.78, 186,035.76 and 74,380.64

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Solution

The fourth proportional to 134,807.78, 186,035.76 and 74,380.64 is: 102,645.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,807.78 : 186,035.76 = 74,380.64 : x
  2. Step 2: Convert to fraction form
    134,807.78/186,035.76 = 74,380.64/x
  3. Step 3: Cross multiply
    134,807.78x = 186,035.76 × 74,380.64
  4. Step 4: Simplify right side
    134,807.78x = 13,837,457,961.51
  5. Step 5: Solve for x
    x = 13,837,457,961.51/134,807.78
  6. Step 6: Final answer
    x = 102,645.84

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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.