Home / 120,779.87-181,074.51-76,312.89

Finding the Fourth Proportional to 120,779.87, 181,074.51 and 76,312.89

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Solution

The fourth proportional to 120,779.87, 181,074.51 and 76,312.89 is: 114,409.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,779.87 : 181,074.51 = 76,312.89 : x
  2. Step 2: Convert to fraction form
    120,779.87/181,074.51 = 76,312.89/x
  3. Step 3: Cross multiply
    120,779.87x = 181,074.51 × 76,312.89
  4. Step 4: Simplify right side
    120,779.87x = 13,818,319,163.43
  5. Step 5: Solve for x
    x = 13,818,319,163.43/120,779.87
  6. Step 6: Final answer
    x = 114,409.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.