Home / 128,691.08-177,595.44-72,101.24

Finding the Fourth Proportional to 128,691.08, 177,595.44 and 72,101.24

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Solution

The fourth proportional to 128,691.08, 177,595.44 and 72,101.24 is: 99,500.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,691.08 : 177,595.44 = 72,101.24 : x
  2. Step 2: Convert to fraction form
    128,691.08/177,595.44 = 72,101.24/x
  3. Step 3: Cross multiply
    128,691.08x = 177,595.44 × 72,101.24
  4. Step 4: Simplify right side
    128,691.08x = 12,804,851,442.35
  5. Step 5: Solve for x
    x = 12,804,851,442.35/128,691.08
  6. Step 6: Final answer
    x = 99,500.69

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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.