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Finding the Fourth Proportional to 129,606.75, 178,857.32 and 69,990.75

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Solution

The fourth proportional to 129,606.75, 178,857.32 and 69,990.75 is: 96,587.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,606.75 : 178,857.32 = 69,990.75 : x
  2. Step 2: Convert to fraction form
    129,606.75/178,857.32 = 69,990.75/x
  3. Step 3: Cross multiply
    129,606.75x = 178,857.32 × 69,990.75
  4. Step 4: Simplify right side
    129,606.75x = 12,518,357,619.84
  5. Step 5: Solve for x
    x = 12,518,357,619.84/129,606.75
  6. Step 6: Final answer
    x = 96,587.24

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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.