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Finding the Fourth Proportional to 84,050.30, 115,938.86 and 66,116.90

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Solution

The fourth proportional to 84,050.30, 115,938.86 and 66,116.90 is: 91,201.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,050.30 : 115,938.86 = 66,116.90 : x
  2. Step 2: Convert to fraction form
    84,050.30/115,938.86 = 66,116.90/x
  3. Step 3: Cross multiply
    84,050.30x = 115,938.86 × 66,116.90
  4. Step 4: Simplify right side
    84,050.30x = 7,665,518,012.73
  5. Step 5: Solve for x
    x = 7,665,518,012.73/84,050.30
  6. Step 6: Final answer
    x = 91,201.55

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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.