Home / 128,763.08-177,695.21-71,404.82

Finding the Fourth Proportional to 128,763.08, 177,695.21 and 71,404.82

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Solution

The fourth proportional to 128,763.08, 177,695.21 and 71,404.82 is: 98,539.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,763.08 : 177,695.21 = 71,404.82 : x
  2. Step 2: Convert to fraction form
    128,763.08/177,695.21 = 71,404.82/x
  3. Step 3: Cross multiply
    128,763.08x = 177,695.21 × 71,404.82
  4. Step 4: Simplify right side
    128,763.08x = 12,688,293,439.47
  5. Step 5: Solve for x
    x = 12,688,293,439.47/128,763.08
  6. Step 6: Final answer
    x = 98,539.84

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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.