Home / 128,318.47-177,080.64-70,961.68

Finding the Fourth Proportional to 128,318.47, 177,080.64 and 70,961.68

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Solution

The fourth proportional to 128,318.47, 177,080.64 and 70,961.68 is: 97,927.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,318.47 : 177,080.64 = 70,961.68 : x
  2. Step 2: Convert to fraction form
    128,318.47/177,080.64 = 70,961.68/x
  3. Step 3: Cross multiply
    128,318.47x = 177,080.64 × 70,961.68
  4. Step 4: Simplify right side
    128,318.47x = 12,565,939,709.88
  5. Step 5: Solve for x
    x = 12,565,939,709.88/128,318.47
  6. Step 6: Final answer
    x = 97,927.76

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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.