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Finding the Fourth Proportional to 128,967.62, 177,975.20 and 75,242.23

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Solution

The fourth proportional to 128,967.62, 177,975.20 and 75,242.23 is: 103,834.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,967.62 : 177,975.20 = 75,242.23 : x
  2. Step 2: Convert to fraction form
    128,967.62/177,975.20 = 75,242.23/x
  3. Step 3: Cross multiply
    128,967.62x = 177,975.20 × 75,242.23
  4. Step 4: Simplify right side
    128,967.62x = 13,391,250,675.86
  5. Step 5: Solve for x
    x = 13,391,250,675.86/128,967.62
  6. Step 6: Final answer
    x = 103,834.21

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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.