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Finding the Fourth Proportional to 98,999.70, 148,512.90 and 28,878.42

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Solution

The fourth proportional to 98,999.70, 148,512.90 and 28,878.42 is: 43,321.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,999.70 : 148,512.90 = 28,878.42 : x
  2. Step 2: Convert to fraction form
    98,999.70/148,512.90 = 28,878.42/x
  3. Step 3: Cross multiply
    98,999.70x = 148,512.90 × 28,878.42
  4. Step 4: Simplify right side
    98,999.70x = 4,288,817,901.62
  5. Step 5: Solve for x
    x = 4,288,817,901.62/98,999.70
  6. Step 6: Final answer
    x = 43,321.52

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1.5x scale

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.