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Finding the Fourth Proportional to 118,980.45, 178,437.53 and 38,990.25

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Solution

The fourth proportional to 118,980.45, 178,437.53 and 38,990.25 is: 58,474.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,980.45 : 178,437.53 = 38,990.25 : x
  2. Step 2: Convert to fraction form
    118,980.45/178,437.53 = 38,990.25/x
  3. Step 3: Cross multiply
    118,980.45x = 178,437.53 × 38,990.25
  4. Step 4: Simplify right side
    118,980.45x = 6,957,323,709.13
  5. Step 5: Solve for x
    x = 6,957,323,709.13/118,980.45
  6. Step 6: Final answer
    x = 58,474.51

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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.