Home / 81,813.90-122,690.45-28,492.19

Finding the Fourth Proportional to 81,813.90, 122,690.45 and 28,492.19

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Solution

The fourth proportional to 81,813.90, 122,690.45 and 28,492.19 is: 42,727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.90 : 122,690.45 = 28,492.19 : x
  2. Step 2: Convert to fraction form
    81,813.90/122,690.45 = 28,492.19/x
  3. Step 3: Cross multiply
    81,813.90x = 122,690.45 × 28,492.19
  4. Step 4: Simplify right side
    81,813.90x = 3,495,719,070.36
  5. Step 5: Solve for x
    x = 3,495,719,070.36/81,813.90
  6. Step 6: Final answer
    x = 42,727.69

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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.