Home / 128,291.99-177,039.89-71,708.63

Finding the Fourth Proportional to 128,291.99, 177,039.89 and 71,708.63

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Solution

The fourth proportional to 128,291.99, 177,039.89 and 71,708.63 is: 98,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,291.99 : 177,039.89 = 71,708.63 : x
  2. Step 2: Convert to fraction form
    128,291.99/177,039.89 = 71,708.63/x
  3. Step 3: Cross multiply
    128,291.99x = 177,039.89 × 71,708.63
  4. Step 4: Simplify right side
    128,291.99x = 12,695,287,521.86
  5. Step 5: Solve for x
    x = 12,695,287,521.86/128,291.99
  6. Step 6: Final answer
    x = 98,956.20

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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.