Home / 128,857.50-177,901.11-84,223.26

Finding the Fourth Proportional to 128,857.50, 177,901.11 and 84,223.26

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Solution

The fourth proportional to 128,857.50, 177,901.11 and 84,223.26 is: 116,278.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,857.50 : 177,901.11 = 84,223.26 : x
  2. Step 2: Convert to fraction form
    128,857.50/177,901.11 = 84,223.26/x
  3. Step 3: Cross multiply
    128,857.50x = 177,901.11 × 84,223.26
  4. Step 4: Simplify right side
    128,857.50x = 14,983,411,441.82
  5. Step 5: Solve for x
    x = 14,983,411,441.82/128,857.50
  6. Step 6: Final answer
    x = 116,278.92

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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.