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Finding the Fourth Proportional to 128,311.60, 177,054.54 and 70,943.17

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Solution

The fourth proportional to 128,311.60, 177,054.54 and 70,943.17 is: 97,893.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.60 : 177,054.54 = 70,943.17 : x
  2. Step 2: Convert to fraction form
    128,311.60/177,054.54 = 70,943.17/x
  3. Step 3: Cross multiply
    128,311.60x = 177,054.54 × 70,943.17
  4. Step 4: Simplify right side
    128,311.60x = 12,560,810,330.49
  5. Step 5: Solve for x
    x = 12,560,810,330.49/128,311.60
  6. Step 6: Final answer
    x = 97,893.02

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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.