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Finding the Fourth Proportional to 103,524.70, 155,287.05 and 90,694.30

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Solution

The fourth proportional to 103,524.70, 155,287.05 and 90,694.30 is: 136,041.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,524.70 : 155,287.05 = 90,694.30 : x
  2. Step 2: Convert to fraction form
    103,524.70/155,287.05 = 90,694.30/x
  3. Step 3: Cross multiply
    103,524.70x = 155,287.05 × 90,694.30
  4. Step 4: Simplify right side
    103,524.70x = 14,083,650,298.82
  5. Step 5: Solve for x
    x = 14,083,650,298.82/103,524.70
  6. Step 6: Final answer
    x = 136,041.45

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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.