Home / 78,939.48-108,938.64-47,126.88

Finding the Fourth Proportional to 78,939.48, 108,938.64 and 47,126.88

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Solution

The fourth proportional to 78,939.48, 108,938.64 and 47,126.88 is: 65,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.48 : 108,938.64 = 47,126.88 : x
  2. Step 2: Convert to fraction form
    78,939.48/108,938.64 = 47,126.88/x
  3. Step 3: Cross multiply
    78,939.48x = 108,938.64 × 47,126.88
  4. Step 4: Simplify right side
    78,939.48x = 5,133,938,214.64
  5. Step 5: Solve for x
    x = 5,133,938,214.64/78,939.48
  6. Step 6: Final answer
    x = 65,036.38

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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.