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Finding the Fourth Proportional to 75,342.80, 103,965.49 and 45,127.35

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Solution

The fourth proportional to 75,342.80, 103,965.49 and 45,127.35 is: 62,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,342.80 : 103,965.49 = 45,127.35 : x
  2. Step 2: Convert to fraction form
    75,342.80/103,965.49 = 45,127.35/x
  3. Step 3: Cross multiply
    75,342.80x = 103,965.49 × 45,127.35
  4. Step 4: Simplify right side
    75,342.80x = 4,691,687,055.15
  5. Step 5: Solve for x
    x = 4,691,687,055.15/75,342.80
  6. Step 6: Final answer
    x = 62,271.21

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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.