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Finding the Fourth Proportional to 122,757.88, 169,345.84 and 74,928.20

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Solution

The fourth proportional to 122,757.88, 169,345.84 and 74,928.20 is: 103,364.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,757.88 : 169,345.84 = 74,928.20 : x
  2. Step 2: Convert to fraction form
    122,757.88/169,345.84 = 74,928.20/x
  3. Step 3: Cross multiply
    122,757.88x = 169,345.84 × 74,928.20
  4. Step 4: Simplify right side
    122,757.88x = 12,688,778,968.69
  5. Step 5: Solve for x
    x = 12,688,778,968.69/122,757.88
  6. Step 6: Final answer
    x = 103,364.27

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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.