Home / 78,730.74-118,115.55-64,850.58

Finding the Fourth Proportional to 78,730.74, 118,115.55 and 64,850.58

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Solution

The fourth proportional to 78,730.74, 118,115.55 and 64,850.58 is: 97,291.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.74 : 118,115.55 = 64,850.58 : x
  2. Step 2: Convert to fraction form
    78,730.74/118,115.55 = 64,850.58/x
  3. Step 3: Cross multiply
    78,730.74x = 118,115.55 × 64,850.58
  4. Step 4: Simplify right side
    78,730.74x = 7,659,861,924.52
  5. Step 5: Solve for x
    x = 7,659,861,924.52/78,730.74
  6. Step 6: Final answer
    x = 97,291.88

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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.