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Finding the Fourth Proportional to 272,395.36, 408,658.48 and 85,406.88

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Solution

The fourth proportional to 272,395.36, 408,658.48 and 85,406.88 is: 128,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,395.36 : 408,658.48 = 85,406.88 : x
  2. Step 2: Convert to fraction form
    272,395.36/408,658.48 = 85,406.88/x
  3. Step 3: Cross multiply
    272,395.36x = 408,658.48 × 85,406.88
  4. Step 4: Simplify right side
    272,395.36x = 34,902,245,762.34
  5. Step 5: Solve for x
    x = 34,902,245,762.34/272,395.36
  6. Step 6: Final answer
    x = 128,130.84

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1.5x scale

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.