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Finding the Fourth Proportional to 75,356.82, 103,995.63 and 45,136.40

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Solution

The fourth proportional to 75,356.82, 103,995.63 and 45,136.40 is: 62,290.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,356.82 : 103,995.63 = 45,136.40 : x
  2. Step 2: Convert to fraction form
    75,356.82/103,995.63 = 45,136.40/x
  3. Step 3: Cross multiply
    75,356.82x = 103,995.63 × 45,136.40
  4. Step 4: Simplify right side
    75,356.82x = 4,693,987,833.95
  5. Step 5: Solve for x
    x = 4,693,987,833.95/75,356.82
  6. Step 6: Final answer
    x = 62,290.15

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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.