Home / 78,865.71-118,178.87-57,819.77

Finding the Fourth Proportional to 78,865.71, 118,178.87 and 57,819.77

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Solution

The fourth proportional to 78,865.71, 118,178.87 and 57,819.77 is: 86,641.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,865.71 : 118,178.87 = 57,819.77 : x
  2. Step 2: Convert to fraction form
    78,865.71/118,178.87 = 57,819.77/x
  3. Step 3: Cross multiply
    78,865.71x = 118,178.87 × 57,819.77
  4. Step 4: Simplify right side
    78,865.71x = 6,833,074,202.27
  5. Step 5: Solve for x
    x = 6,833,074,202.27/78,865.71
  6. Step 6: Final answer
    x = 86,641.89

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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.