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Finding the Fourth Proportional to 122,281.88, 168,778.98 and 74,561.52

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Solution

The fourth proportional to 122,281.88, 168,778.98 and 74,561.52 is: 102,913.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,281.88 : 168,778.98 = 74,561.52 : x
  2. Step 2: Convert to fraction form
    122,281.88/168,778.98 = 74,561.52/x
  3. Step 3: Cross multiply
    122,281.88x = 168,778.98 × 74,561.52
  4. Step 4: Simplify right side
    122,281.88x = 12,584,417,292.85
  5. Step 5: Solve for x
    x = 12,584,417,292.85/122,281.88
  6. Step 6: Final answer
    x = 102,913.18

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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.