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Finding the Fourth Proportional to 128,693.66, 177,537.18 and 80,973.32

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Solution

The fourth proportional to 128,693.66, 177,537.18 and 80,973.32 is: 111,705.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,693.66 : 177,537.18 = 80,973.32 : x
  2. Step 2: Convert to fraction form
    128,693.66/177,537.18 = 80,973.32/x
  3. Step 3: Cross multiply
    128,693.66x = 177,537.18 × 80,973.32
  4. Step 4: Simplify right side
    128,693.66x = 14,375,773,595.49
  5. Step 5: Solve for x
    x = 14,375,773,595.49/128,693.66
  6. Step 6: Final answer
    x = 111,705.38

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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.