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Finding the Fourth Proportional to 122,140.37, 168,553.78 and 74,393.78

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Solution

The fourth proportional to 122,140.37, 168,553.78 and 74,393.78 is: 102,663.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,140.37 : 168,553.78 = 74,393.78 : x
  2. Step 2: Convert to fraction form
    122,140.37/168,553.78 = 74,393.78/x
  3. Step 3: Cross multiply
    122,140.37x = 168,553.78 × 74,393.78
  4. Step 4: Simplify right side
    122,140.37x = 12,539,351,798.74
  5. Step 5: Solve for x
    x = 12,539,351,798.74/122,140.37
  6. Step 6: Final answer
    x = 102,663.45

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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.