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Finding the Fourth Proportional to 118,665.70, 177,998.55 and 74,428.90

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Solution

The fourth proportional to 118,665.70, 177,998.55 and 74,428.90 is: 111,643.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,665.70 : 177,998.55 = 74,428.90 : x
  2. Step 2: Convert to fraction form
    118,665.70/177,998.55 = 74,428.90/x
  3. Step 3: Cross multiply
    118,665.70x = 177,998.55 × 74,428.90
  4. Step 4: Simplify right side
    118,665.70x = 13,248,236,278.10
  5. Step 5: Solve for x
    x = 13,248,236,278.10/118,665.70
  6. Step 6: Final answer
    x = 111,643.35

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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.