Home / 120,089.22-165,699.57-72,345.18

Finding the Fourth Proportional to 120,089.22, 165,699.57 and 72,345.18

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Solution

The fourth proportional to 120,089.22, 165,699.57 and 72,345.18 is: 99,822.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,089.22 : 165,699.57 = 72,345.18 : x
  2. Step 2: Convert to fraction form
    120,089.22/165,699.57 = 72,345.18/x
  3. Step 3: Cross multiply
    120,089.22x = 165,699.57 × 72,345.18
  4. Step 4: Simplify right side
    120,089.22x = 11,987,565,217.57
  5. Step 5: Solve for x
    x = 11,987,565,217.57/120,089.22
  6. Step 6: Final answer
    x = 99,822.16

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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.