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Finding the Fourth Proportional to 357,079.92, 535,623.02 and 90,840.72

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Solution

The fourth proportional to 357,079.92, 535,623.02 and 90,840.72 is: 136,261.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,079.92 : 535,623.02 = 90,840.72 : x
  2. Step 2: Convert to fraction form
    357,079.92/535,623.02 = 90,840.72/x
  3. Step 3: Cross multiply
    357,079.92x = 535,623.02 × 90,840.72
  4. Step 4: Simplify right side
    357,079.92x = 48,656,380,785.37
  5. Step 5: Solve for x
    x = 48,656,380,785.37/357,079.92
  6. Step 6: Final answer
    x = 136,261.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.