Home / 115,781.28-159,779.52-64,797.12

Finding the Fourth Proportional to 115,781.28, 159,779.52 and 64,797.12

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Solution

The fourth proportional to 115,781.28, 159,779.52 and 64,797.12 is: 89,420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,781.28 : 159,779.52 = 64,797.12 : x
  2. Step 2: Convert to fraction form
    115,781.28/159,779.52 = 64,797.12/x
  3. Step 3: Cross multiply
    115,781.28x = 159,779.52 × 64,797.12
  4. Step 4: Simplify right side
    115,781.28x = 10,353,252,730.98
  5. Step 5: Solve for x
    x = 10,353,252,730.98/115,781.28
  6. Step 6: Final answer
    x = 89,420.78

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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.