Home / 78,215.54-107,909.16-51,372.60

Finding the Fourth Proportional to 78,215.54, 107,909.16 and 51,372.60

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Solution

The fourth proportional to 78,215.54, 107,909.16 and 51,372.60 is: 70,875.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,215.54 : 107,909.16 = 51,372.60 : x
  2. Step 2: Convert to fraction form
    78,215.54/107,909.16 = 51,372.60/x
  3. Step 3: Cross multiply
    78,215.54x = 107,909.16 × 51,372.60
  4. Step 4: Simplify right side
    78,215.54x = 5,543,574,113.02
  5. Step 5: Solve for x
    x = 5,543,574,113.02/78,215.54
  6. Step 6: Final answer
    x = 70,875.61

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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.