Home / 128,823.17-177,777.81-77,828.81

Finding the Fourth Proportional to 128,823.17, 177,777.81 and 77,828.81

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Solution

The fourth proportional to 128,823.17, 177,777.81 and 77,828.81 is: 107,404.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,823.17 : 177,777.81 = 77,828.81 : x
  2. Step 2: Convert to fraction form
    128,823.17/177,777.81 = 77,828.81/x
  3. Step 3: Cross multiply
    128,823.17x = 177,777.81 × 77,828.81
  4. Step 4: Simplify right side
    128,823.17x = 13,836,234,507.82
  5. Step 5: Solve for x
    x = 13,836,234,507.82/128,823.17
  6. Step 6: Final answer
    x = 107,404.86

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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.