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Finding the Fourth Proportional to 85,709.80, 118,153.65 and 60,138.91

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Solution

The fourth proportional to 85,709.80, 118,153.65 and 60,138.91 is: 82,903.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,709.80 : 118,153.65 = 60,138.91 : x
  2. Step 2: Convert to fraction form
    85,709.80/118,153.65 = 60,138.91/x
  3. Step 3: Cross multiply
    85,709.80x = 118,153.65 × 60,138.91
  4. Step 4: Simplify right side
    85,709.80x = 7,105,631,723.52
  5. Step 5: Solve for x
    x = 7,105,631,723.52/85,709.80
  6. Step 6: Final answer
    x = 82,903.38

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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.