Home / 78,520.66-108,359.58-42,712.18

Finding the Fourth Proportional to 78,520.66, 108,359.58 and 42,712.18

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Solution

The fourth proportional to 78,520.66, 108,359.58 and 42,712.18 is: 58,943.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,520.66 : 108,359.58 = 42,712.18 : x
  2. Step 2: Convert to fraction form
    78,520.66/108,359.58 = 42,712.18/x
  3. Step 3: Cross multiply
    78,520.66x = 108,359.58 × 42,712.18
  4. Step 4: Simplify right side
    78,520.66x = 4,628,273,885.68
  5. Step 5: Solve for x
    x = 4,628,273,885.68/78,520.66
  6. Step 6: Final answer
    x = 58,943.39

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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.