Home / 77,988.10-107,623.62-42,178.11

Finding the Fourth Proportional to 77,988.10, 107,623.62 and 42,178.11

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Solution

The fourth proportional to 77,988.10, 107,623.62 and 42,178.11 is: 58,205.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,988.10 : 107,623.62 = 42,178.11 : x
  2. Step 2: Convert to fraction form
    77,988.10/107,623.62 = 42,178.11/x
  3. Step 3: Cross multiply
    77,988.10x = 107,623.62 × 42,178.11
  4. Step 4: Simplify right side
    77,988.10x = 4,539,360,882.96
  5. Step 5: Solve for x
    x = 4,539,360,882.96/77,988.10
  6. Step 6: Final answer
    x = 58,205.81

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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.