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Finding the Fourth Proportional to 128,296.58, 177,041.66 and 70,932.51

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Solution

The fourth proportional to 128,296.58, 177,041.66 and 70,932.51 is: 97,882.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,296.58 : 177,041.66 = 70,932.51 : x
  2. Step 2: Convert to fraction form
    128,296.58/177,041.66 = 70,932.51/x
  3. Step 3: Cross multiply
    128,296.58x = 177,041.66 × 70,932.51
  4. Step 4: Simplify right side
    128,296.58x = 12,558,008,963.70
  5. Step 5: Solve for x
    x = 12,558,008,963.70/128,296.58
  6. Step 6: Final answer
    x = 97,882.65

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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.