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Finding the Fourth Proportional to 127,990.40, 191,985.60 and 72,003.20

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Solution

The fourth proportional to 127,990.40, 191,985.60 and 72,003.20 is: 108,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,990.40 : 191,985.60 = 72,003.20 : x
  2. Step 2: Convert to fraction form
    127,990.40/191,985.60 = 72,003.20/x
  3. Step 3: Cross multiply
    127,990.40x = 191,985.60 × 72,003.20
  4. Step 4: Simplify right side
    127,990.40x = 13,823,577,553.92
  5. Step 5: Solve for x
    x = 13,823,577,553.92/127,990.40
  6. Step 6: Final answer
    x = 108,004.80

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1.5x scale

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.