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Finding the Fourth Proportional to 100,858.70, 151,288.05 and 99,109.10

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Solution

The fourth proportional to 100,858.70, 151,288.05 and 99,109.10 is: 148,663.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,858.70 : 151,288.05 = 99,109.10 : x
  2. Step 2: Convert to fraction form
    100,858.70/151,288.05 = 99,109.10/x
  3. Step 3: Cross multiply
    100,858.70x = 151,288.05 × 99,109.10
  4. Step 4: Simplify right side
    100,858.70x = 14,994,022,476.26
  5. Step 5: Solve for x
    x = 14,994,022,476.26/100,858.70
  6. Step 6: Final answer
    x = 148,663.65

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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.