Home / 128,926.81-177,922.07-72,342.37

Finding the Fourth Proportional to 128,926.81, 177,922.07 and 72,342.37

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Solution

The fourth proportional to 128,926.81, 177,922.07 and 72,342.37 is: 99,834.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,926.81 : 177,922.07 = 72,342.37 : x
  2. Step 2: Convert to fraction form
    128,926.81/177,922.07 = 72,342.37/x
  3. Step 3: Cross multiply
    128,926.81x = 177,922.07 × 72,342.37
  4. Step 4: Simplify right side
    128,926.81x = 12,871,304,219.11
  5. Step 5: Solve for x
    x = 12,871,304,219.11/128,926.81
  6. Step 6: Final answer
    x = 99,834.19

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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.