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Finding the Fourth Proportional to 103,320.98, 154,981.48 and 40,991.48

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Solution

The fourth proportional to 103,320.98, 154,981.48 and 40,991.48 is: 61,487.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,320.98 : 154,981.48 = 40,991.48 : x
  2. Step 2: Convert to fraction form
    103,320.98/154,981.48 = 40,991.48/x
  3. Step 3: Cross multiply
    103,320.98x = 154,981.48 × 40,991.48
  4. Step 4: Simplify right side
    103,320.98x = 6,352,920,237.79
  5. Step 5: Solve for x
    x = 6,352,920,237.79/103,320.98
  6. Step 6: Final answer
    x = 61,487.22

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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.