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Finding the Fourth Proportional to 85,845.85, 128,805.77 and 46,430.71

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Solution

The fourth proportional to 85,845.85, 128,805.77 and 46,430.71 is: 69,666.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.85 : 128,805.77 = 46,430.71 : x
  2. Step 2: Convert to fraction form
    85,845.85/128,805.77 = 46,430.71/x
  3. Step 3: Cross multiply
    85,845.85x = 128,805.77 × 46,430.71
  4. Step 4: Simplify right side
    85,845.85x = 5,980,542,593.09
  5. Step 5: Solve for x
    x = 5,980,542,593.09/85,845.85
  6. Step 6: Final answer
    x = 69,666.07

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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.