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Finding the Fourth Proportional to 118,420.70, 177,631.05 and 99,758.30

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Solution

The fourth proportional to 118,420.70, 177,631.05 and 99,758.30 is: 149,637.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,420.70 : 177,631.05 = 99,758.30 : x
  2. Step 2: Convert to fraction form
    118,420.70/177,631.05 = 99,758.30/x
  3. Step 3: Cross multiply
    118,420.70x = 177,631.05 × 99,758.30
  4. Step 4: Simplify right side
    118,420.70x = 17,720,171,575.22
  5. Step 5: Solve for x
    x = 17,720,171,575.22/118,420.70
  6. Step 6: Final answer
    x = 149,637.45

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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.