Home / 78,119.55-107,804.44-42,308.74

Finding the Fourth Proportional to 78,119.55, 107,804.44 and 42,308.74

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Solution

The fourth proportional to 78,119.55, 107,804.44 and 42,308.74 is: 58,385.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,119.55 : 107,804.44 = 42,308.74 : x
  2. Step 2: Convert to fraction form
    78,119.55/107,804.44 = 42,308.74/x
  3. Step 3: Cross multiply
    78,119.55x = 107,804.44 × 42,308.74
  4. Step 4: Simplify right side
    78,119.55x = 4,561,069,272.24
  5. Step 5: Solve for x
    x = 4,561,069,272.24/78,119.55
  6. Step 6: Final answer
    x = 58,385.76

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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.