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Finding the Fourth Proportional to 85,805.90, 118,280.89 and 60,240.55

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Solution

The fourth proportional to 85,805.90, 118,280.89 and 60,240.55 is: 83,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805.90 : 118,280.89 = 60,240.55 : x
  2. Step 2: Convert to fraction form
    85,805.90/118,280.89 = 60,240.55/x
  3. Step 3: Cross multiply
    85,805.90x = 118,280.89 × 60,240.55
  4. Step 4: Simplify right side
    85,805.90x = 7,125,305,421.79
  5. Step 5: Solve for x
    x = 7,125,305,421.79/85,805.90
  6. Step 6: Final answer
    x = 83,039.81

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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.