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Finding the Fourth Proportional to 65,805.10, 90,810.75 and 35,590.46

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Solution

The fourth proportional to 65,805.10, 90,810.75 and 35,590.46 is: 49,114.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,805.10 : 90,810.75 = 35,590.46 : x
  2. Step 2: Convert to fraction form
    65,805.10/90,810.75 = 35,590.46/x
  3. Step 3: Cross multiply
    65,805.10x = 90,810.75 × 35,590.46
  4. Step 4: Simplify right side
    65,805.10x = 3,231,996,138.42
  5. Step 5: Solve for x
    x = 3,231,996,138.42/65,805.10
  6. Step 6: Final answer
    x = 49,114.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.