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Finding the Fourth Proportional to 128,130.54, 176,813.73 and 71,530.98

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Solution

The fourth proportional to 128,130.54, 176,813.73 and 71,530.98 is: 98,709.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,130.54 : 176,813.73 = 71,530.98 : x
  2. Step 2: Convert to fraction form
    128,130.54/176,813.73 = 71,530.98/x
  3. Step 3: Cross multiply
    128,130.54x = 176,813.73 × 71,530.98
  4. Step 4: Simplify right side
    128,130.54x = 12,647,659,384.36
  5. Step 5: Solve for x
    x = 12,647,659,384.36/128,130.54
  6. Step 6: Final answer
    x = 98,709.17

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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.