Home / 78,195.08-107,909.43-42,385.23

Finding the Fourth Proportional to 78,195.08, 107,909.43 and 42,385.23

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Solution

The fourth proportional to 78,195.08, 107,909.43 and 42,385.23 is: 58,491.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,195.08 : 107,909.43 = 42,385.23 : x
  2. Step 2: Convert to fraction form
    78,195.08/107,909.43 = 42,385.23/x
  3. Step 3: Cross multiply
    78,195.08x = 107,909.43 × 42,385.23
  4. Step 4: Simplify right side
    78,195.08x = 4,573,766,009.72
  5. Step 5: Solve for x
    x = 4,573,766,009.72/78,195.08
  6. Step 6: Final answer
    x = 58,491.74

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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.