Home / 421,981.50-632,972.25-126,493.50

Finding the Fourth Proportional to 421,981.50, 632,972.25 and 126,493.50

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Solution

The fourth proportional to 421,981.50, 632,972.25 and 126,493.50 is: 189,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,981.50 : 632,972.25 = 126,493.50 : x
  2. Step 2: Convert to fraction form
    421,981.50/632,972.25 = 126,493.50/x
  3. Step 3: Cross multiply
    421,981.50x = 632,972.25 × 126,493.50
  4. Step 4: Simplify right side
    421,981.50x = 80,066,875,305.38
  5. Step 5: Solve for x
    x = 80,066,875,305.38/421,981.50
  6. Step 6: Final answer
    x = 189,740.25

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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.