Home / 81,501.60-122,252.40-76,908.90

Finding the Fourth Proportional to 81,501.60, 122,252.40 and 76,908.90

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Solution

The fourth proportional to 81,501.60, 122,252.40 and 76,908.90 is: 115,363.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,501.60 : 122,252.40 = 76,908.90 : x
  2. Step 2: Convert to fraction form
    81,501.60/122,252.40 = 76,908.90/x
  3. Step 3: Cross multiply
    81,501.60x = 122,252.40 × 76,908.90
  4. Step 4: Simplify right side
    81,501.60x = 9,402,297,606.36
  5. Step 5: Solve for x
    x = 9,402,297,606.36/81,501.60
  6. Step 6: Final answer
    x = 115,363.35

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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.