Home / 131,320.90-197,127.15-81,457.30

Finding the Fourth Proportional to 131,320.90, 197,127.15 and 81,457.30

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Solution

The fourth proportional to 131,320.90, 197,127.15 and 81,457.30 is: 122,276.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,320.90 : 197,127.15 = 81,457.30 : x
  2. Step 2: Convert to fraction form
    131,320.90/197,127.15 = 81,457.30/x
  3. Step 3: Cross multiply
    131,320.90x = 197,127.15 × 81,457.30
  4. Step 4: Simplify right side
    131,320.90x = 16,057,445,395.70
  5. Step 5: Solve for x
    x = 16,057,445,395.70/131,320.90
  6. Step 6: Final answer
    x = 122,276.39

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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.