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Finding the Fourth Proportional to 128,295.34, 177,053.74 and 70,933.60

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Solution

The fourth proportional to 128,295.34, 177,053.74 and 70,933.60 is: 97,891.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295.34 : 177,053.74 = 70,933.60 : x
  2. Step 2: Convert to fraction form
    128,295.34/177,053.74 = 70,933.60/x
  3. Step 3: Cross multiply
    128,295.34x = 177,053.74 × 70,933.60
  4. Step 4: Simplify right side
    128,295.34x = 12,559,059,171.66
  5. Step 5: Solve for x
    x = 12,559,059,171.66/128,295.34
  6. Step 6: Final answer
    x = 97,891.78

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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.