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Finding the Fourth Proportional to 128,095.70, 176,771.16 and 70,738.58

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Solution

The fourth proportional to 128,095.70, 176,771.16 and 70,738.58 is: 97,618.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,095.70 : 176,771.16 = 70,738.58 : x
  2. Step 2: Convert to fraction form
    128,095.70/176,771.16 = 70,738.58/x
  3. Step 3: Cross multiply
    128,095.70x = 176,771.16 × 70,738.58
  4. Step 4: Simplify right side
    128,095.70x = 12,504,541,285.28
  5. Step 5: Solve for x
    x = 12,504,541,285.28/128,095.70
  6. Step 6: Final answer
    x = 97,618.75

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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.