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Finding the Fourth Proportional to 99,317.80, 148,976.70 and 25,445.80

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Solution

The fourth proportional to 99,317.80, 148,976.70 and 25,445.80 is: 38,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,317.80 : 148,976.70 = 25,445.80 : x
  2. Step 2: Convert to fraction form
    99,317.80/148,976.70 = 25,445.80/x
  3. Step 3: Cross multiply
    99,317.80x = 148,976.70 × 25,445.80
  4. Step 4: Simplify right side
    99,317.80x = 3,790,831,312.86
  5. Step 5: Solve for x
    x = 3,790,831,312.86/99,317.80
  6. Step 6: Final answer
    x = 38,168.70

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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.