Home / 90,699.36-136,095.12-40,769.40

Finding the Fourth Proportional to 90,699.36, 136,095.12 and 40,769.40

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Solution

The fourth proportional to 90,699.36, 136,095.12 and 40,769.40 is: 61,174.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,699.36 : 136,095.12 = 40,769.40 : x
  2. Step 2: Convert to fraction form
    90,699.36/136,095.12 = 40,769.40/x
  3. Step 3: Cross multiply
    90,699.36x = 136,095.12 × 40,769.40
  4. Step 4: Simplify right side
    90,699.36x = 5,548,516,385.33
  5. Step 5: Solve for x
    x = 5,548,516,385.33/90,699.36
  6. Step 6: Final answer
    x = 61,174.81

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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.