Home / 115,680.89-159,638.73-64,693.70

Finding the Fourth Proportional to 115,680.89, 159,638.73 and 64,693.70

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Solution

The fourth proportional to 115,680.89, 159,638.73 and 64,693.70 is: 89,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,680.89 : 159,638.73 = 64,693.70 : x
  2. Step 2: Convert to fraction form
    115,680.89/159,638.73 = 64,693.70/x
  3. Step 3: Cross multiply
    115,680.89x = 159,638.73 × 64,693.70
  4. Step 4: Simplify right side
    115,680.89x = 10,327,620,107.00
  5. Step 5: Solve for x
    x = 10,327,620,107.00/115,680.89
  6. Step 6: Final answer
    x = 89,276.80

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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.