Home / 78,834.30-118,251.45-72,383.10

Finding the Fourth Proportional to 78,834.30, 118,251.45 and 72,383.10

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Solution

The fourth proportional to 78,834.30, 118,251.45 and 72,383.10 is: 108,574.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,834.30 : 118,251.45 = 72,383.10 : x
  2. Step 2: Convert to fraction form
    78,834.30/118,251.45 = 72,383.10/x
  3. Step 3: Cross multiply
    78,834.30x = 118,251.45 × 72,383.10
  4. Step 4: Simplify right side
    78,834.30x = 8,559,406,530.50
  5. Step 5: Solve for x
    x = 8,559,406,530.50/78,834.30
  6. Step 6: Final answer
    x = 108,574.65

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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.