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Finding the Fourth Proportional to 151,938.90, 209,675.49 and 84,870.90

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Solution

The fourth proportional to 151,938.90, 209,675.49 and 84,870.90 is: 117,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,938.90 : 209,675.49 = 84,870.90 : x
  2. Step 2: Convert to fraction form
    151,938.90/209,675.49 = 84,870.90/x
  3. Step 3: Cross multiply
    151,938.90x = 209,675.49 × 84,870.90
  4. Step 4: Simplify right side
    151,938.90x = 17,795,347,544.24
  5. Step 5: Solve for x
    x = 17,795,347,544.24/151,938.90
  6. Step 6: Final answer
    x = 117,121.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.