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Finding the Fourth Proportional to 129,573.54, 178,844.90 and 84,364.47

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Solution

The fourth proportional to 129,573.54, 178,844.90 and 84,364.47 is: 116,444.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,573.54 : 178,844.90 = 84,364.47 : x
  2. Step 2: Convert to fraction form
    129,573.54/178,844.90 = 84,364.47/x
  3. Step 3: Cross multiply
    129,573.54x = 178,844.90 × 84,364.47
  4. Step 4: Simplify right side
    129,573.54x = 15,088,154,778.88
  5. Step 5: Solve for x
    x = 15,088,154,778.88/129,573.54
  6. Step 6: Final answer
    x = 116,444.72

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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.