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Finding the Fourth Proportional to 102,708.80, 154,063.20 and 69,531.20

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Solution

The fourth proportional to 102,708.80, 154,063.20 and 69,531.20 is: 104,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,708.80 : 154,063.20 = 69,531.20 : x
  2. Step 2: Convert to fraction form
    102,708.80/154,063.20 = 69,531.20/x
  3. Step 3: Cross multiply
    102,708.80x = 154,063.20 × 69,531.20
  4. Step 4: Simplify right side
    102,708.80x = 10,712,199,171.84
  5. Step 5: Solve for x
    x = 10,712,199,171.84/102,708.80
  6. Step 6: Final answer
    x = 104,296.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.