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Finding the Fourth Proportional to 118,011.42, 177,017.30 and 90,090.01

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Solution

The fourth proportional to 118,011.42, 177,017.30 and 90,090.01 is: 135,135.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,011.42 : 177,017.30 = 90,090.01 : x
  2. Step 2: Convert to fraction form
    118,011.42/177,017.30 = 90,090.01/x
  3. Step 3: Cross multiply
    118,011.42x = 177,017.30 × 90,090.01
  4. Step 4: Simplify right side
    118,011.42x = 15,947,489,216.86
  5. Step 5: Solve for x
    x = 15,947,489,216.86/118,011.42
  6. Step 6: Final answer
    x = 135,135.14

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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.