Home / 137,784.78-190,132.48-77,343.75

Finding the Fourth Proportional to 137,784.78, 190,132.48 and 77,343.75

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Solution

The fourth proportional to 137,784.78, 190,132.48 and 77,343.75 is: 106,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,784.78 : 190,132.48 = 77,343.75 : x
  2. Step 2: Convert to fraction form
    137,784.78/190,132.48 = 77,343.75/x
  3. Step 3: Cross multiply
    137,784.78x = 190,132.48 × 77,343.75
  4. Step 4: Simplify right side
    137,784.78x = 14,705,559,000
  5. Step 5: Solve for x
    x = 14,705,559,000/137,784.78
  6. Step 6: Final answer
    x = 106,728.47

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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.