Home / 128,927.56-177,923.10-72,343.12

Finding the Fourth Proportional to 128,927.56, 177,923.10 and 72,343.12

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Solution

The fourth proportional to 128,927.56, 177,923.10 and 72,343.12 is: 99,835.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,927.56 : 177,923.10 = 72,343.12 : x
  2. Step 2: Convert to fraction form
    128,927.56/177,923.10 = 72,343.12/x
  3. Step 3: Cross multiply
    128,927.56x = 177,923.10 × 72,343.12
  4. Step 4: Simplify right side
    128,927.56x = 12,871,512,174.07
  5. Step 5: Solve for x
    x = 12,871,512,174.07/128,927.56
  6. Step 6: Final answer
    x = 99,835.23

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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.