Home / 128,920.24-177,907.15-71,556.20

Finding the Fourth Proportional to 128,920.24, 177,907.15 and 71,556.20

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Solution

The fourth proportional to 128,920.24, 177,907.15 and 71,556.20 is: 98,746.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,920.24 : 177,907.15 = 71,556.20 : x
  2. Step 2: Convert to fraction form
    128,920.24/177,907.15 = 71,556.20/x
  3. Step 3: Cross multiply
    128,920.24x = 177,907.15 × 71,556.20
  4. Step 4: Simplify right side
    128,920.24x = 12,730,359,606.83
  5. Step 5: Solve for x
    x = 12,730,359,606.83/128,920.24
  6. Step 6: Final answer
    x = 98,746.01

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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.