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Finding the Fourth Proportional to 129,693.27, 178,914.69 and 75,245.16

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Solution

The fourth proportional to 129,693.27, 178,914.69 and 75,245.16 is: 103,802.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,693.27 : 178,914.69 = 75,245.16 : x
  2. Step 2: Convert to fraction form
    129,693.27/178,914.69 = 75,245.16/x
  3. Step 3: Cross multiply
    129,693.27x = 178,914.69 × 75,245.16
  4. Step 4: Simplify right side
    129,693.27x = 13,462,464,475.40
  5. Step 5: Solve for x
    x = 13,462,464,475.40/129,693.27
  6. Step 6: Final answer
    x = 103,802.34

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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.