Home / 78,064.35-107,699.99-51,221.76

Finding the Fourth Proportional to 78,064.35, 107,699.99 and 51,221.76

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Solution

The fourth proportional to 78,064.35, 107,699.99 and 51,221.76 is: 70,667.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,064.35 : 107,699.99 = 51,221.76 : x
  2. Step 2: Convert to fraction form
    78,064.35/107,699.99 = 51,221.76/x
  3. Step 3: Cross multiply
    78,064.35x = 107,699.99 × 51,221.76
  4. Step 4: Simplify right side
    78,064.35x = 5,516,582,783.67
  5. Step 5: Solve for x
    x = 5,516,582,783.67/78,064.35
  6. Step 6: Final answer
    x = 70,667.12

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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.