Home / 128,564.28-177,434.55-77,606.28

Finding the Fourth Proportional to 128,564.28, 177,434.55 and 77,606.28

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Solution

The fourth proportional to 128,564.28, 177,434.55 and 77,606.28 is: 107,106.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,564.28 : 177,434.55 = 77,606.28 : x
  2. Step 2: Convert to fraction form
    128,564.28/177,434.55 = 77,606.28/x
  3. Step 3: Cross multiply
    128,564.28x = 177,434.55 × 77,606.28
  4. Step 4: Simplify right side
    128,564.28x = 13,770,035,368.97
  5. Step 5: Solve for x
    x = 13,770,035,368.97/128,564.28
  6. Step 6: Final answer
    x = 107,106.23

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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.