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Finding the Fourth Proportional to 128,797.03, 177,741.37 and 71,437.49

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Solution

The fourth proportional to 128,797.03, 177,741.37 and 71,437.49 is: 98,584.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,797.03 : 177,741.37 = 71,437.49 : x
  2. Step 2: Convert to fraction form
    128,797.03/177,741.37 = 71,437.49/x
  3. Step 3: Cross multiply
    128,797.03x = 177,741.37 × 71,437.49
  4. Step 4: Simplify right side
    128,797.03x = 12,697,397,341.96
  5. Step 5: Solve for x
    x = 12,697,397,341.96/128,797.03
  6. Step 6: Final answer
    x = 98,584.55

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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.