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Finding the Fourth Proportional to 66,779.94, 92,129.31 and 39,907.11

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Solution

The fourth proportional to 66,779.94, 92,129.31 and 39,907.11 is: 55,055.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,779.94 : 92,129.31 = 39,907.11 : x
  2. Step 2: Convert to fraction form
    66,779.94/92,129.31 = 39,907.11/x
  3. Step 3: Cross multiply
    66,779.94x = 92,129.31 × 39,907.11
  4. Step 4: Simplify right side
    66,779.94x = 3,676,614,508.39
  5. Step 5: Solve for x
    x = 3,676,614,508.39/66,779.94
  6. Step 6: Final answer
    x = 55,055.67

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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.