Home / 120,779.13-180,355.36-98,636.43

Finding the Fourth Proportional to 120,779.13, 180,355.36 and 98,636.43

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Solution

The fourth proportional to 120,779.13, 180,355.36 and 98,636.43 is: 147,290.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,779.13 : 180,355.36 = 98,636.43 : x
  2. Step 2: Convert to fraction form
    120,779.13/180,355.36 = 98,636.43/x
  3. Step 3: Cross multiply
    120,779.13x = 180,355.36 × 98,636.43
  4. Step 4: Simplify right side
    120,779.13x = 17,789,608,841.76
  5. Step 5: Solve for x
    x = 17,789,608,841.76/120,779.13
  6. Step 6: Final answer
    x = 147,290.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.