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Finding the Fourth Proportional to 98,949.70, 148,424.55 and 72,705.70

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Solution

The fourth proportional to 98,949.70, 148,424.55 and 72,705.70 is: 109,058.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,949.70 : 148,424.55 = 72,705.70 : x
  2. Step 2: Convert to fraction form
    98,949.70/148,424.55 = 72,705.70/x
  3. Step 3: Cross multiply
    98,949.70x = 148,424.55 × 72,705.70
  4. Step 4: Simplify right side
    98,949.70x = 10,791,310,804.94
  5. Step 5: Solve for x
    x = 10,791,310,804.94/98,949.70
  6. Step 6: Final answer
    x = 109,058.55

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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.