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Finding the Fourth Proportional to 128,265.16, 177,003.32 and 70,906.90

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Solution

The fourth proportional to 128,265.16, 177,003.32 and 70,906.90 is: 97,850.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,265.16 : 177,003.32 = 70,906.90 : x
  2. Step 2: Convert to fraction form
    128,265.16/177,003.32 = 70,906.90/x
  3. Step 3: Cross multiply
    128,265.16x = 177,003.32 × 70,906.90
  4. Step 4: Simplify right side
    128,265.16x = 12,550,756,710.91
  5. Step 5: Solve for x
    x = 12,550,756,710.91/128,265.16
  6. Step 6: Final answer
    x = 97,850.08

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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.