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Finding the Fourth Proportional to 118,012.17, 177,018.42 and 90,090.76

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Solution

The fourth proportional to 118,012.17, 177,018.42 and 90,090.76 is: 135,136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,012.17 : 177,018.42 = 90,090.76 : x
  2. Step 2: Convert to fraction form
    118,012.17/177,018.42 = 90,090.76/x
  3. Step 3: Cross multiply
    118,012.17x = 177,018.42 × 90,090.76
  4. Step 4: Simplify right side
    118,012.17x = 15,947,723,991.80
  5. Step 5: Solve for x
    x = 15,947,723,991.80/118,012.17
  6. Step 6: Final answer
    x = 135,136.27

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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.