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Finding the Fourth Proportional to 128,141.76, 176,832.84 and 70,777.56

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Solution

The fourth proportional to 128,141.76, 176,832.84 and 70,777.56 is: 97,671.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,141.76 : 176,832.84 = 70,777.56 : x
  2. Step 2: Convert to fraction form
    128,141.76/176,832.84 = 70,777.56/x
  3. Step 3: Cross multiply
    128,141.76x = 176,832.84 × 70,777.56
  4. Step 4: Simplify right side
    128,141.76x = 12,515,796,943.07
  5. Step 5: Solve for x
    x = 12,515,796,943.07/128,141.76
  6. Step 6: Final answer
    x = 97,671.49

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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.