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Finding the Fourth Proportional to 128,651.49, 177,522.44 and 72,062.87

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Solution

The fourth proportional to 128,651.49, 177,522.44 and 72,062.87 is: 99,437.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,651.49 : 177,522.44 = 72,062.87 : x
  2. Step 2: Convert to fraction form
    128,651.49/177,522.44 = 72,062.87/x
  3. Step 3: Cross multiply
    128,651.49x = 177,522.44 × 72,062.87
  4. Step 4: Simplify right side
    128,651.49x = 12,792,775,267.88
  5. Step 5: Solve for x
    x = 12,792,775,267.88/128,651.49
  6. Step 6: Final answer
    x = 99,437.44

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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.