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Finding the Fourth Proportional to 81,211.68, 112,062.96 and 45,400.50

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Solution

The fourth proportional to 81,211.68, 112,062.96 and 45,400.50 is: 62,647.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211.68 : 112,062.96 = 45,400.50 : x
  2. Step 2: Convert to fraction form
    81,211.68/112,062.96 = 45,400.50/x
  3. Step 3: Cross multiply
    81,211.68x = 112,062.96 × 45,400.50
  4. Step 4: Simplify right side
    81,211.68x = 5,087,714,415.48
  5. Step 5: Solve for x
    x = 5,087,714,415.48/81,211.68
  6. Step 6: Final answer
    x = 62,647.57

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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.