Home / 136,981.10-205,342.05-80,864.30

Finding the Fourth Proportional to 136,981.10, 205,342.05 and 80,864.30

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Solution

The fourth proportional to 136,981.10, 205,342.05 and 80,864.30 is: 121,219.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,981.10 : 205,342.05 = 80,864.30 : x
  2. Step 2: Convert to fraction form
    136,981.10/205,342.05 = 80,864.30/x
  3. Step 3: Cross multiply
    136,981.10x = 205,342.05 × 80,864.30
  4. Step 4: Simplify right side
    136,981.10x = 16,604,841,133.82
  5. Step 5: Solve for x
    x = 16,604,841,133.82/136,981.10
  6. Step 6: Final answer
    x = 121,219.94

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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.