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Finding the Fourth Proportional to 58,218.48, 80,278 and 39,322.80

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Solution

The fourth proportional to 58,218.48, 80,278 and 39,322.80 is: 54,222.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,218.48 : 80,278 = 39,322.80 : x
  2. Step 2: Convert to fraction form
    58,218.48/80,278 = 39,322.80/x
  3. Step 3: Cross multiply
    58,218.48x = 80,278 × 39,322.80
  4. Step 4: Simplify right side
    58,218.48x = 3,156,755,738.40
  5. Step 5: Solve for x
    x = 3,156,755,738.40/58,218.48
  6. Step 6: Final answer
    x = 54,222.57

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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.