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Finding the Fourth Proportional to 128,366.94, 177,132.74 and 70,997.14

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Solution

The fourth proportional to 128,366.94, 177,132.74 and 70,997.14 is: 97,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,366.94 : 177,132.74 = 70,997.14 : x
  2. Step 2: Convert to fraction form
    128,366.94/177,132.74 = 70,997.14/x
  3. Step 3: Cross multiply
    128,366.94x = 177,132.74 × 70,997.14
  4. Step 4: Simplify right side
    128,366.94x = 12,575,917,585.38
  5. Step 5: Solve for x
    x = 12,575,917,585.38/128,366.94
  6. Step 6: Final answer
    x = 97,968.51

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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.