Home / 128,150.08-176,800.20-80,386

Finding the Fourth Proportional to 128,150.08, 176,800.20 and 80,386

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Solution

The fourth proportional to 128,150.08, 176,800.20 and 80,386 is: 110,903.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,150.08 : 176,800.20 = 80,386 : x
  2. Step 2: Convert to fraction form
    128,150.08/176,800.20 = 80,386/x
  3. Step 3: Cross multiply
    128,150.08x = 176,800.20 × 80,386
  4. Step 4: Simplify right side
    128,150.08x = 14,212,260,877.20
  5. Step 5: Solve for x
    x = 14,212,260,877.20/128,150.08
  6. Step 6: Final answer
    x = 110,903.25

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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.