Home / 128,623.62-177,503.04-72,034.86

Finding the Fourth Proportional to 128,623.62, 177,503.04 and 72,034.86

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Solution

The fourth proportional to 128,623.62, 177,503.04 and 72,034.86 is: 99,409.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,623.62 : 177,503.04 = 72,034.86 : x
  2. Step 2: Convert to fraction form
    128,623.62/177,503.04 = 72,034.86/x
  3. Step 3: Cross multiply
    128,623.62x = 177,503.04 × 72,034.86
  4. Step 4: Simplify right side
    128,623.62x = 12,786,406,635.97
  5. Step 5: Solve for x
    x = 12,786,406,635.97/128,623.62
  6. Step 6: Final answer
    x = 99,409.48

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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.