Home / 128,932.48-177,927.06-72,343.72

Finding the Fourth Proportional to 128,932.48, 177,927.06 and 72,343.72

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Solution

The fourth proportional to 128,932.48, 177,927.06 and 72,343.72 is: 99,834.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,932.48 : 177,927.06 = 72,343.72 : x
  2. Step 2: Convert to fraction form
    128,932.48/177,927.06 = 72,343.72/x
  3. Step 3: Cross multiply
    128,932.48x = 177,927.06 × 72,343.72
  4. Step 4: Simplify right side
    128,932.48x = 12,871,905,409.06
  5. Step 5: Solve for x
    x = 12,871,905,409.06/128,932.48
  6. Step 6: Final answer
    x = 99,834.47

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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.