Home / 128,108.07-176,862.91-85,145.81

Finding the Fourth Proportional to 128,108.07, 176,862.91 and 85,145.81

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Solution

The fourth proportional to 128,108.07, 176,862.91 and 85,145.81 is: 117,550.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.07 : 176,862.91 = 85,145.81 : x
  2. Step 2: Convert to fraction form
    128,108.07/176,862.91 = 85,145.81/x
  3. Step 3: Cross multiply
    128,108.07x = 176,862.91 × 85,145.81
  4. Step 4: Simplify right side
    128,108.07x = 15,059,135,730.91
  5. Step 5: Solve for x
    x = 15,059,135,730.91/128,108.07
  6. Step 6: Final answer
    x = 117,550.25

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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.