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Finding the Fourth Proportional to 128,059.57, 176,731.91 and 70,709.82

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Solution

The fourth proportional to 128,059.57, 176,731.91 and 70,709.82 is: 97,584.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,059.57 : 176,731.91 = 70,709.82 : x
  2. Step 2: Convert to fraction form
    128,059.57/176,731.91 = 70,709.82/x
  3. Step 3: Cross multiply
    128,059.57x = 176,731.91 × 70,709.82
  4. Step 4: Simplify right side
    128,059.57x = 12,496,681,544.36
  5. Step 5: Solve for x
    x = 12,496,681,544.36/128,059.57
  6. Step 6: Final answer
    x = 97,584.91

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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.