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Finding the Fourth Proportional to 129,623.64, 178,880.64 and 70,007.64

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Solution

The fourth proportional to 129,623.64, 178,880.64 and 70,007.64 is: 96,610.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,623.64 : 178,880.64 = 70,007.64 : x
  2. Step 2: Convert to fraction form
    129,623.64/178,880.64 = 70,007.64/x
  3. Step 3: Cross multiply
    129,623.64x = 178,880.64 × 70,007.64
  4. Step 4: Simplify right side
    129,623.64x = 12,523,011,448.09
  5. Step 5: Solve for x
    x = 12,523,011,448.09/129,623.64
  6. Step 6: Final answer
    x = 96,610.55

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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.