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Finding the Fourth Proportional to 90,501, 135,755.16 and 43,091.70

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Solution

The fourth proportional to 90,501, 135,755.16 and 43,091.70 is: 64,639.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,501 : 135,755.16 = 43,091.70 : x
  2. Step 2: Convert to fraction form
    90,501/135,755.16 = 43,091.70/x
  3. Step 3: Cross multiply
    90,501x = 135,755.16 × 43,091.70
  4. Step 4: Simplify right side
    90,501x = 5,849,920,628.17
  5. Step 5: Solve for x
    x = 5,849,920,628.17/90,501
  6. Step 6: Final answer
    x = 64,639.29

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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.