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Finding the Fourth Proportional to 90,903.78, 136,355.76 and 43,507.74

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Solution

The fourth proportional to 90,903.78, 136,355.76 and 43,507.74 is: 65,261.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,903.78 : 136,355.76 = 43,507.74 : x
  2. Step 2: Convert to fraction form
    90,903.78/136,355.76 = 43,507.74/x
  3. Step 3: Cross multiply
    90,903.78x = 136,355.76 × 43,507.74
  4. Step 4: Simplify right side
    90,903.78x = 5,932,530,953.58
  5. Step 5: Solve for x
    x = 5,932,530,953.58/90,903.78
  6. Step 6: Final answer
    x = 65,261.65

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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.