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Finding the Fourth Proportional to 81,702.15, 112,739.06 and 45,403.42

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Solution

The fourth proportional to 81,702.15, 112,739.06 and 45,403.42 is: 62,651.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,702.15 : 112,739.06 = 45,403.42 : x
  2. Step 2: Convert to fraction form
    81,702.15/112,739.06 = 45,403.42/x
  3. Step 3: Cross multiply
    81,702.15x = 112,739.06 × 45,403.42
  4. Step 4: Simplify right side
    81,702.15x = 5,118,738,327.89
  5. Step 5: Solve for x
    x = 5,118,738,327.89/81,702.15
  6. Step 6: Final answer
    x = 62,651.21

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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.