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Finding the Fourth Proportional to 81,295.98, 112,139.32 and 53,700.80

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Solution

The fourth proportional to 81,295.98, 112,139.32 and 53,700.80 is: 74,074.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,295.98 : 112,139.32 = 53,700.80 : x
  2. Step 2: Convert to fraction form
    81,295.98/112,139.32 = 53,700.80/x
  3. Step 3: Cross multiply
    81,295.98x = 112,139.32 × 53,700.80
  4. Step 4: Simplify right side
    81,295.98x = 6,021,971,195.46
  5. Step 5: Solve for x
    x = 6,021,971,195.46/81,295.98
  6. Step 6: Final answer
    x = 74,074.65

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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.