Home / 78,178.13-107,897.39-49,500.45

Finding the Fourth Proportional to 78,178.13, 107,897.39 and 49,500.45

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Solution

The fourth proportional to 78,178.13, 107,897.39 and 49,500.45 is: 68,317.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,178.13 : 107,897.39 = 49,500.45 : x
  2. Step 2: Convert to fraction form
    78,178.13/107,897.39 = 49,500.45/x
  3. Step 3: Cross multiply
    78,178.13x = 107,897.39 × 49,500.45
  4. Step 4: Simplify right side
    78,178.13x = 5,340,969,731.29
  5. Step 5: Solve for x
    x = 5,340,969,731.29/78,178.13
  6. Step 6: Final answer
    x = 68,317.96

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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.