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Finding the Fourth Proportional to 107,351.88, 148,043.52 and 78,253.80

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Solution

The fourth proportional to 107,351.88, 148,043.52 and 78,253.80 is: 107,915.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,351.88 : 148,043.52 = 78,253.80 : x
  2. Step 2: Convert to fraction form
    107,351.88/148,043.52 = 78,253.80/x
  3. Step 3: Cross multiply
    107,351.88x = 148,043.52 × 78,253.80
  4. Step 4: Simplify right side
    107,351.88x = 11,584,968,005.38
  5. Step 5: Solve for x
    x = 11,584,968,005.38/107,351.88
  6. Step 6: Final answer
    x = 107,915.84

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1.5x scale

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.