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Finding the Fourth Proportional to 90,338.09, 135,323.09 and 42,809.11

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Solution

The fourth proportional to 90,338.09, 135,323.09 and 42,809.11 is: 64,126.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,338.09 : 135,323.09 = 42,809.11 : x
  2. Step 2: Convert to fraction form
    90,338.09/135,323.09 = 42,809.11/x
  3. Step 3: Cross multiply
    90,338.09x = 135,323.09 × 42,809.11
  4. Step 4: Simplify right side
    90,338.09x = 5,793,060,653.53
  5. Step 5: Solve for x
    x = 5,793,060,653.53/90,338.09
  6. Step 6: Final answer
    x = 64,126.45

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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.