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Finding the Fourth Proportional to 357,079.86, 535,622.80 and 90,840.60

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Solution

The fourth proportional to 357,079.86, 535,622.80 and 90,840.60 is: 136,261.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,079.86 : 535,622.80 = 90,840.60 : x
  2. Step 2: Convert to fraction form
    357,079.86/535,622.80 = 90,840.60/x
  3. Step 3: Cross multiply
    357,079.86x = 535,622.80 × 90,840.60
  4. Step 4: Simplify right side
    357,079.86x = 48,656,296,525.68
  5. Step 5: Solve for x
    x = 48,656,296,525.68/357,079.86
  6. Step 6: Final answer
    x = 136,261.67

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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.