Home / 128,137.58-176,783.01-80,373.50

Finding the Fourth Proportional to 128,137.58, 176,783.01 and 80,373.50

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Solution

The fourth proportional to 128,137.58, 176,783.01 and 80,373.50 is: 110,886.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,137.58 : 176,783.01 = 80,373.50 : x
  2. Step 2: Convert to fraction form
    128,137.58/176,783.01 = 80,373.50/x
  3. Step 3: Cross multiply
    128,137.58x = 176,783.01 × 80,373.50
  4. Step 4: Simplify right side
    128,137.58x = 14,208,669,254.24
  5. Step 5: Solve for x
    x = 14,208,669,254.24/128,137.58
  6. Step 6: Final answer
    x = 110,886.04

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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.