Home / 131,328.90-197,139.15-81,465.30

Finding the Fourth Proportional to 131,328.90, 197,139.15 and 81,465.30

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Solution

The fourth proportional to 131,328.90, 197,139.15 and 81,465.30 is: 122,288.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,328.90 : 197,139.15 = 81,465.30 : x
  2. Step 2: Convert to fraction form
    131,328.90/197,139.15 = 81,465.30/x
  3. Step 3: Cross multiply
    131,328.90x = 197,139.15 × 81,465.30
  4. Step 4: Simplify right side
    131,328.90x = 16,059,999,996.50
  5. Step 5: Solve for x
    x = 16,059,999,996.50/131,328.90
  6. Step 6: Final answer
    x = 122,288.39

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1.5x scale

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.