Home / 128,137.08-176,782.32-80,373

Finding the Fourth Proportional to 128,137.08, 176,782.32 and 80,373

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Solution

The fourth proportional to 128,137.08, 176,782.32 and 80,373 is: 110,885.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,137.08 : 176,782.32 = 80,373 : x
  2. Step 2: Convert to fraction form
    128,137.08/176,782.32 = 80,373/x
  3. Step 3: Cross multiply
    128,137.08x = 176,782.32 × 80,373
  4. Step 4: Simplify right side
    128,137.08x = 14,208,525,405.36
  5. Step 5: Solve for x
    x = 14,208,525,405.36/128,137.08
  6. Step 6: Final answer
    x = 110,885.35

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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.