Home / 128,741.32-177,660.30-72,151.48

Finding the Fourth Proportional to 128,741.32, 177,660.30 and 72,151.48

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Solution

The fourth proportional to 128,741.32, 177,660.30 and 72,151.48 is: 99,567.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,741.32 : 177,660.30 = 72,151.48 : x
  2. Step 2: Convert to fraction form
    128,741.32/177,660.30 = 72,151.48/x
  3. Step 3: Cross multiply
    128,741.32x = 177,660.30 × 72,151.48
  4. Step 4: Simplify right side
    128,741.32x = 12,818,453,582.24
  5. Step 5: Solve for x
    x = 12,818,453,582.24/128,741.32
  6. Step 6: Final answer
    x = 99,567.52

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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.