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Finding the Fourth Proportional to 128,309.52, 177,059.94 and 70,945.53

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Solution

The fourth proportional to 128,309.52, 177,059.94 and 70,945.53 is: 97,900.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309.52 : 177,059.94 = 70,945.53 : x
  2. Step 2: Convert to fraction form
    128,309.52/177,059.94 = 70,945.53/x
  3. Step 3: Cross multiply
    128,309.52x = 177,059.94 × 70,945.53
  4. Step 4: Simplify right side
    128,309.52x = 12,561,611,285.07
  5. Step 5: Solve for x
    x = 12,561,611,285.07/128,309.52
  6. Step 6: Final answer
    x = 97,900.85

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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.