Home / 128,526.80-177,341.78-80,752.47

Finding the Fourth Proportional to 128,526.80, 177,341.78 and 80,752.47

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Solution

The fourth proportional to 128,526.80, 177,341.78 and 80,752.47 is: 111,422.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,526.80 : 177,341.78 = 80,752.47 : x
  2. Step 2: Convert to fraction form
    128,526.80/177,341.78 = 80,752.47/x
  3. Step 3: Cross multiply
    128,526.80x = 177,341.78 × 80,752.47
  4. Step 4: Simplify right side
    128,526.80x = 14,320,786,577.70
  5. Step 5: Solve for x
    x = 14,320,786,577.70/128,526.80
  6. Step 6: Final answer
    x = 111,422.57

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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.