Home / 113,439.58-156,555.66-65,693.78

Finding the Fourth Proportional to 113,439.58, 156,555.66 and 65,693.78

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Solution

The fourth proportional to 113,439.58, 156,555.66 and 65,693.78 is: 90,662.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,439.58 : 156,555.66 = 65,693.78 : x
  2. Step 2: Convert to fraction form
    113,439.58/156,555.66 = 65,693.78/x
  3. Step 3: Cross multiply
    113,439.58x = 156,555.66 × 65,693.78
  4. Step 4: Simplify right side
    113,439.58x = 10,284,733,085.79
  5. Step 5: Solve for x
    x = 10,284,733,085.79/113,439.58
  6. Step 6: Final answer
    x = 90,662.65

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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.