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Finding the Fourth Proportional to 56,131.80, 77,399.06 and 45,890.90

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Solution

The fourth proportional to 56,131.80, 77,399.06 and 45,890.90 is: 63,278.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,131.80 : 77,399.06 = 45,890.90 : x
  2. Step 2: Convert to fraction form
    56,131.80/77,399.06 = 45,890.90/x
  3. Step 3: Cross multiply
    56,131.80x = 77,399.06 × 45,890.90
  4. Step 4: Simplify right side
    56,131.80x = 3,551,912,522.55
  5. Step 5: Solve for x
    x = 3,551,912,522.55/56,131.80
  6. Step 6: Final answer
    x = 63,278.08

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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.