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Finding the Fourth Proportional to 122,762.40, 169,354.89 and 79,738.98

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Solution

The fourth proportional to 122,762.40, 169,354.89 and 79,738.98 is: 110,002.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,762.40 : 169,354.89 = 79,738.98 : x
  2. Step 2: Convert to fraction form
    122,762.40/169,354.89 = 79,738.98/x
  3. Step 3: Cross multiply
    122,762.40x = 169,354.89 × 79,738.98
  4. Step 4: Simplify right side
    122,762.40x = 13,504,186,186.61
  5. Step 5: Solve for x
    x = 13,504,186,186.61/122,762.40
  6. Step 6: Final answer
    x = 110,002.62

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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.