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Finding the Fourth Proportional to 248,060.40, 372,139.20 and 105,905.40

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Solution

The fourth proportional to 248,060.40, 372,139.20 and 105,905.40 is: 158,878.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,060.40 : 372,139.20 = 105,905.40 : x
  2. Step 2: Convert to fraction form
    248,060.40/372,139.20 = 105,905.40/x
  3. Step 3: Cross multiply
    248,060.40x = 372,139.20 × 105,905.40
  4. Step 4: Simplify right side
    248,060.40x = 39,411,550,831.68
  5. Step 5: Solve for x
    x = 39,411,550,831.68/248,060.40
  6. Step 6: Final answer
    x = 158,878.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.