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Finding the Fourth Proportional to 122,818.40, 169,486.80 and 69,102.80

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Solution

The fourth proportional to 122,818.40, 169,486.80 and 69,102.80 is: 95,360.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,818.40 : 169,486.80 = 69,102.80 : x
  2. Step 2: Convert to fraction form
    122,818.40/169,486.80 = 69,102.80/x
  3. Step 3: Cross multiply
    122,818.40x = 169,486.80 × 69,102.80
  4. Step 4: Simplify right side
    122,818.40x = 11,712,012,443.04
  5. Step 5: Solve for x
    x = 11,712,012,443.04/122,818.40
  6. Step 6: Final answer
    x = 95,360.41

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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.