Home / 78,701.28-108,604.59-42,890.51

Finding the Fourth Proportional to 78,701.28, 108,604.59 and 42,890.51

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Solution

The fourth proportional to 78,701.28, 108,604.59 and 42,890.51 is: 59,187.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,701.28 : 108,604.59 = 42,890.51 : x
  2. Step 2: Convert to fraction form
    78,701.28/108,604.59 = 42,890.51/x
  3. Step 3: Cross multiply
    78,701.28x = 108,604.59 × 42,890.51
  4. Step 4: Simplify right side
    78,701.28x = 4,658,106,253.44
  5. Step 5: Solve for x
    x = 4,658,106,253.44/78,701.28
  6. Step 6: Final answer
    x = 59,187.17

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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.