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Finding the Fourth Proportional to 153,489.99, 211,819.93 and 85,508.09

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Solution

The fourth proportional to 153,489.99, 211,819.93 and 85,508.09 is: 118,003.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,489.99 : 211,819.93 = 85,508.09 : x
  2. Step 2: Convert to fraction form
    153,489.99/211,819.93 = 85,508.09/x
  3. Step 3: Cross multiply
    153,489.99x = 211,819.93 × 85,508.09
  4. Step 4: Simplify right side
    153,489.99x = 18,112,317,159.69
  5. Step 5: Solve for x
    x = 18,112,317,159.69/153,489.99
  6. Step 6: Final answer
    x = 118,003.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.