Home / 78,534.98-117,812.59-28,607.38

Finding the Fourth Proportional to 78,534.98, 117,812.59 and 28,607.38

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Solution

The fourth proportional to 78,534.98, 117,812.59 and 28,607.38 is: 42,914.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,534.98 : 117,812.59 = 28,607.38 : x
  2. Step 2: Convert to fraction form
    78,534.98/117,812.59 = 28,607.38/x
  3. Step 3: Cross multiply
    78,534.98x = 117,812.59 × 28,607.38
  4. Step 4: Simplify right side
    78,534.98x = 3,370,309,530.91
  5. Step 5: Solve for x
    x = 3,370,309,530.91/78,534.98
  6. Step 6: Final answer
    x = 42,914.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.