Home / 128,961.02-177,966.30-72,372.38

Finding the Fourth Proportional to 128,961.02, 177,966.30 and 72,372.38

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Solution

The fourth proportional to 128,961.02, 177,966.30 and 72,372.38 is: 99,873.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,961.02 : 177,966.30 = 72,372.38 : x
  2. Step 2: Convert to fraction form
    128,961.02/177,966.30 = 72,372.38/x
  3. Step 3: Cross multiply
    128,961.02x = 177,966.30 × 72,372.38
  4. Step 4: Simplify right side
    128,961.02x = 12,879,844,690.79
  5. Step 5: Solve for x
    x = 12,879,844,690.79/128,961.02
  6. Step 6: Final answer
    x = 99,873.94

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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.