Home / 78,269.77-107,931.09-66,976.64

Finding the Fourth Proportional to 78,269.77, 107,931.09 and 66,976.64

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Solution

The fourth proportional to 78,269.77, 107,931.09 and 66,976.64 is: 92,358.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,269.77 : 107,931.09 = 66,976.64 : x
  2. Step 2: Convert to fraction form
    78,269.77/107,931.09 = 66,976.64/x
  3. Step 3: Cross multiply
    78,269.77x = 107,931.09 × 66,976.64
  4. Step 4: Simplify right side
    78,269.77x = 7,228,861,759.74
  5. Step 5: Solve for x
    x = 7,228,861,759.74/78,269.77
  6. Step 6: Final answer
    x = 92,358.29

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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.