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Finding the Fourth Proportional to 81,777.42, 112,836.31 and 47,779.34

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Solution

The fourth proportional to 81,777.42, 112,836.31 and 47,779.34 is: 65,925.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,777.42 : 112,836.31 = 47,779.34 : x
  2. Step 2: Convert to fraction form
    81,777.42/112,836.31 = 47,779.34/x
  3. Step 3: Cross multiply
    81,777.42x = 112,836.31 × 47,779.34
  4. Step 4: Simplify right side
    81,777.42x = 5,391,243,736.21
  5. Step 5: Solve for x
    x = 5,391,243,736.21/81,777.42
  6. Step 6: Final answer
    x = 65,925.82

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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.