Home / 128,215.68-176,931.84-71,616

Finding the Fourth Proportional to 128,215.68, 176,931.84 and 71,616

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Solution

The fourth proportional to 128,215.68, 176,931.84 and 71,616 is: 98,826.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215.68 : 176,931.84 = 71,616 : x
  2. Step 2: Convert to fraction form
    128,215.68/176,931.84 = 71,616/x
  3. Step 3: Cross multiply
    128,215.68x = 176,931.84 × 71,616
  4. Step 4: Simplify right side
    128,215.68x = 12,671,150,653.44
  5. Step 5: Solve for x
    x = 12,671,150,653.44/128,215.68
  6. Step 6: Final answer
    x = 98,826.84

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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.