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Finding the Fourth Proportional to 128,375.52, 177,098.54 and 83,068.08

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Solution

The fourth proportional to 128,375.52, 177,098.54 and 83,068.08 is: 114,595.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,375.52 : 177,098.54 = 83,068.08 : x
  2. Step 2: Convert to fraction form
    128,375.52/177,098.54 = 83,068.08/x
  3. Step 3: Cross multiply
    128,375.52x = 177,098.54 × 83,068.08
  4. Step 4: Simplify right side
    128,375.52x = 14,711,235,273.26
  5. Step 5: Solve for x
    x = 14,711,235,273.26/128,375.52
  6. Step 6: Final answer
    x = 114,595.33

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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.