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Finding the Fourth Proportional to 134,992, 186,287.04 and 78,435.20

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Solution

The fourth proportional to 134,992, 186,287.04 and 78,435.20 is: 108,239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,992 : 186,287.04 = 78,435.20 : x
  2. Step 2: Convert to fraction form
    134,992/186,287.04 = 78,435.20/x
  3. Step 3: Cross multiply
    134,992x = 186,287.04 × 78,435.20
  4. Step 4: Simplify right side
    134,992x = 14,611,461,239.81
  5. Step 5: Solve for x
    x = 14,611,461,239.81/134,992
  6. Step 6: Final answer
    x = 108,239.46

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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.