Home / 78,179.11-107,886.90-42,370

Finding the Fourth Proportional to 78,179.11, 107,886.90 and 42,370

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Solution

The fourth proportional to 78,179.11, 107,886.90 and 42,370 is: 58,470.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,179.11 : 107,886.90 = 42,370 : x
  2. Step 2: Convert to fraction form
    78,179.11/107,886.90 = 42,370/x
  3. Step 3: Cross multiply
    78,179.11x = 107,886.90 × 42,370
  4. Step 4: Simplify right side
    78,179.11x = 4,571,167,953
  5. Step 5: Solve for x
    x = 4,571,167,953/78,179.11
  6. Step 6: Final answer
    x = 58,470.45

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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.