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Finding the Fourth Proportional to 128,019.59, 176,653.63 and 70,657.85

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Solution

The fourth proportional to 128,019.59, 176,653.63 and 70,657.85 is: 97,500.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.59 : 176,653.63 = 70,657.85 : x
  2. Step 2: Convert to fraction form
    128,019.59/176,653.63 = 70,657.85/x
  3. Step 3: Cross multiply
    128,019.59x = 176,653.63 × 70,657.85
  4. Step 4: Simplify right side
    128,019.59x = 12,481,965,072.22
  5. Step 5: Solve for x
    x = 12,481,965,072.22/128,019.59
  6. Step 6: Final answer
    x = 97,500.43

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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.