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Finding the Fourth Proportional to 128,273.49, 177,002.09 and 70,905.06

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Solution

The fourth proportional to 128,273.49, 177,002.09 and 70,905.06 is: 97,840.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,273.49 : 177,002.09 = 70,905.06 : x
  2. Step 2: Convert to fraction form
    128,273.49/177,002.09 = 70,905.06/x
  3. Step 3: Cross multiply
    128,273.49x = 177,002.09 × 70,905.06
  4. Step 4: Simplify right side
    128,273.49x = 12,550,344,021.34
  5. Step 5: Solve for x
    x = 12,550,344,021.34/128,273.49
  6. Step 6: Final answer
    x = 97,840.51

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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.