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Finding the Fourth Proportional to 138,168.25, 190,658.59 and 77,737.57

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Solution

The fourth proportional to 138,168.25, 190,658.59 and 77,737.57 is: 107,270.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,168.25 : 190,658.59 = 77,737.57 : x
  2. Step 2: Convert to fraction form
    138,168.25/190,658.59 = 77,737.57/x
  3. Step 3: Cross multiply
    138,168.25x = 190,658.59 × 77,737.57
  4. Step 4: Simplify right side
    138,168.25x = 14,821,334,815.24
  5. Step 5: Solve for x
    x = 14,821,334,815.24/138,168.25
  6. Step 6: Final answer
    x = 107,270.19

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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.