Home / 78,121.47-107,777.91-57,752.45

Finding the Fourth Proportional to 78,121.47, 107,777.91 and 57,752.45

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Solution

The fourth proportional to 78,121.47, 107,777.91 and 57,752.45 is: 79,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.47 : 107,777.91 = 57,752.45 : x
  2. Step 2: Convert to fraction form
    78,121.47/107,777.91 = 57,752.45/x
  3. Step 3: Cross multiply
    78,121.47x = 107,777.91 × 57,752.45
  4. Step 4: Simplify right side
    78,121.47x = 6,224,438,115.37
  5. Step 5: Solve for x
    x = 6,224,438,115.37/78,121.47
  6. Step 6: Final answer
    x = 79,676.40

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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.