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Finding the Fourth Proportional to 90,330.84, 135,447.39 and 71,730.54

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Solution

The fourth proportional to 90,330.84, 135,447.39 and 71,730.54 is: 107,557.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,330.84 : 135,447.39 = 71,730.54 : x
  2. Step 2: Convert to fraction form
    90,330.84/135,447.39 = 71,730.54/x
  3. Step 3: Cross multiply
    90,330.84x = 135,447.39 × 71,730.54
  4. Step 4: Simplify right side
    90,330.84x = 9,715,714,426.29
  5. Step 5: Solve for x
    x = 9,715,714,426.29/90,330.84
  6. Step 6: Final answer
    x = 107,557.00

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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.