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Finding the Fourth Proportional to 128,590.95, 177,794.13 and 112,629.60

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Solution

The fourth proportional to 128,590.95, 177,794.13 and 112,629.60 is: 155,725.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,590.95 : 177,794.13 = 112,629.60 : x
  2. Step 2: Convert to fraction form
    128,590.95/177,794.13 = 112,629.60/x
  3. Step 3: Cross multiply
    128,590.95x = 177,794.13 × 112,629.60
  4. Step 4: Simplify right side
    128,590.95x = 20,024,881,744.25
  5. Step 5: Solve for x
    x = 20,024,881,744.25/128,590.95
  6. Step 6: Final answer
    x = 155,725.44

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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.