Home / 128,491.05-177,319.75-70,346.82

Finding the Fourth Proportional to 128,491.05, 177,319.75 and 70,346.82

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Solution

The fourth proportional to 128,491.05, 177,319.75 and 70,346.82 is: 97,079.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,491.05 : 177,319.75 = 70,346.82 : x
  2. Step 2: Convert to fraction form
    128,491.05/177,319.75 = 70,346.82/x
  3. Step 3: Cross multiply
    128,491.05x = 177,319.75 × 70,346.82
  4. Step 4: Simplify right side
    128,491.05x = 12,473,879,958.68
  5. Step 5: Solve for x
    x = 12,473,879,958.68/128,491.05
  6. Step 6: Final answer
    x = 97,079.76

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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.