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Finding the Fourth Proportional to 128,300.70, 177,057.64 and 70,944.74

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Solution

The fourth proportional to 128,300.70, 177,057.64 and 70,944.74 is: 97,905.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,300.70 : 177,057.64 = 70,944.74 : x
  2. Step 2: Convert to fraction form
    128,300.70/177,057.64 = 70,944.74/x
  3. Step 3: Cross multiply
    128,300.70x = 177,057.64 × 70,944.74
  4. Step 4: Simplify right side
    128,300.70x = 12,561,308,674.76
  5. Step 5: Solve for x
    x = 12,561,308,674.76/128,300.70
  6. Step 6: Final answer
    x = 97,905.23

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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.