Home / 128,865.53-177,836.51-72,275.69

Finding the Fourth Proportional to 128,865.53, 177,836.51 and 72,275.69

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Solution

The fourth proportional to 128,865.53, 177,836.51 and 72,275.69 is: 99,741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.53 : 177,836.51 = 72,275.69 : x
  2. Step 2: Convert to fraction form
    128,865.53/177,836.51 = 72,275.69/x
  3. Step 3: Cross multiply
    128,865.53x = 177,836.51 × 72,275.69
  4. Step 4: Simplify right side
    128,865.53x = 12,853,256,467.44
  5. Step 5: Solve for x
    x = 12,853,256,467.44/128,865.53
  6. Step 6: Final answer
    x = 99,741.62

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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.