Home / 78,623.66-108,502.59-42,815.63

Finding the Fourth Proportional to 78,623.66, 108,502.59 and 42,815.63

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Solution

The fourth proportional to 78,623.66, 108,502.59 and 42,815.63 is: 59,086.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,623.66 : 108,502.59 = 42,815.63 : x
  2. Step 2: Convert to fraction form
    78,623.66/108,502.59 = 42,815.63/x
  3. Step 3: Cross multiply
    78,623.66x = 108,502.59 × 42,815.63
  4. Step 4: Simplify right side
    78,623.66x = 4,645,606,204.97
  5. Step 5: Solve for x
    x = 4,645,606,204.97/78,623.66
  6. Step 6: Final answer
    x = 59,086.62

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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.