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Finding the Fourth Proportional to 138,168.01, 190,658.24 and 77,737.32

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Solution

The fourth proportional to 138,168.01, 190,658.24 and 77,737.32 is: 107,269.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,168.01 : 190,658.24 = 77,737.32 : x
  2. Step 2: Convert to fraction form
    138,168.01/190,658.24 = 77,737.32/x
  3. Step 3: Cross multiply
    138,168.01x = 190,658.24 × 77,737.32
  4. Step 4: Simplify right side
    138,168.01x = 14,821,260,613.52
  5. Step 5: Solve for x
    x = 14,821,260,613.52/138,168.01
  6. Step 6: Final answer
    x = 107,269.84

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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.