Home / 78,938.22-108,936.31-43,130.45

Finding the Fourth Proportional to 78,938.22, 108,936.31 and 43,130.45

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Solution

The fourth proportional to 78,938.22, 108,936.31 and 43,130.45 is: 59,520.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.22 : 108,936.31 = 43,130.45 : x
  2. Step 2: Convert to fraction form
    78,938.22/108,936.31 = 43,130.45/x
  3. Step 3: Cross multiply
    78,938.22x = 108,936.31 × 43,130.45
  4. Step 4: Simplify right side
    78,938.22x = 4,698,472,071.64
  5. Step 5: Solve for x
    x = 4,698,472,071.64/78,938.22
  6. Step 6: Final answer
    x = 59,520.88

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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.