Home / 128,824.36-177,777.64-72,235.76

Finding the Fourth Proportional to 128,824.36, 177,777.64 and 72,235.76

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Solution

The fourth proportional to 128,824.36, 177,777.64 and 72,235.76 is: 99,685.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,824.36 : 177,777.64 = 72,235.76 : x
  2. Step 2: Convert to fraction form
    128,824.36/177,777.64 = 72,235.76/x
  3. Step 3: Cross multiply
    128,824.36x = 177,777.64 × 72,235.76
  4. Step 4: Simplify right side
    128,824.36x = 12,841,902,936.41
  5. Step 5: Solve for x
    x = 12,841,902,936.41/128,824.36
  6. Step 6: Final answer
    x = 99,685.36

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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.