Home / 78,023.66-107,672.48-42,213.56

Finding the Fourth Proportional to 78,023.66, 107,672.48 and 42,213.56

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Solution

The fourth proportional to 78,023.66, 107,672.48 and 42,213.56 is: 58,254.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,023.66 : 107,672.48 = 42,213.56 : x
  2. Step 2: Convert to fraction form
    78,023.66/107,672.48 = 42,213.56/x
  3. Step 3: Cross multiply
    78,023.66x = 107,672.48 × 42,213.56
  4. Step 4: Simplify right side
    78,023.66x = 4,545,238,694.83
  5. Step 5: Solve for x
    x = 4,545,238,694.83/78,023.66
  6. Step 6: Final answer
    x = 58,254.62

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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.