Home / 131,812.80-197,719.20-85,118.40

Finding the Fourth Proportional to 131,812.80, 197,719.20 and 85,118.40

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Solution

The fourth proportional to 131,812.80, 197,719.20 and 85,118.40 is: 127,677.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,812.80 : 197,719.20 = 85,118.40 : x
  2. Step 2: Convert to fraction form
    131,812.80/197,719.20 = 85,118.40/x
  3. Step 3: Cross multiply
    131,812.80x = 197,719.20 × 85,118.40
  4. Step 4: Simplify right side
    131,812.80x = 16,829,541,953.28
  5. Step 5: Solve for x
    x = 16,829,541,953.28/131,812.80
  6. Step 6: Final answer
    x = 127,677.60

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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.