Home / 81,135.46-121,699.14-28,545.40

Finding the Fourth Proportional to 81,135.46, 121,699.14 and 28,545.40

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Solution

The fourth proportional to 81,135.46, 121,699.14 and 28,545.40 is: 42,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,135.46 : 121,699.14 = 28,545.40 : x
  2. Step 2: Convert to fraction form
    81,135.46/121,699.14 = 28,545.40/x
  3. Step 3: Cross multiply
    81,135.46x = 121,699.14 × 28,545.40
  4. Step 4: Simplify right side
    81,135.46x = 3,473,950,630.96
  5. Step 5: Solve for x
    x = 3,473,950,630.96/81,135.46
  6. Step 6: Final answer
    x = 42,816.68

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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.