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Finding the Fourth Proportional to 128,164.46, 176,866.39 and 70,803.78

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Solution

The fourth proportional to 128,164.46, 176,866.39 and 70,803.78 is: 97,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,164.46 : 176,866.39 = 70,803.78 : x
  2. Step 2: Convert to fraction form
    128,164.46/176,866.39 = 70,803.78/x
  3. Step 3: Cross multiply
    128,164.46x = 176,866.39 × 70,803.78
  4. Step 4: Simplify right side
    128,164.46x = 12,522,808,392.21
  5. Step 5: Solve for x
    x = 12,522,808,392.21/128,164.46
  6. Step 6: Final answer
    x = 97,708.90

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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.