Home / 78,150.59-117,225.86-18,985.85

Finding the Fourth Proportional to 78,150.59, 117,225.86 and 18,985.85

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Solution

The fourth proportional to 78,150.59, 117,225.86 and 18,985.85 is: 28,478.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.59 : 117,225.86 = 18,985.85 : x
  2. Step 2: Convert to fraction form
    78,150.59/117,225.86 = 18,985.85/x
  3. Step 3: Cross multiply
    78,150.59x = 117,225.86 × 18,985.85
  4. Step 4: Simplify right side
    78,150.59x = 2,225,631,913.02
  5. Step 5: Solve for x
    x = 2,225,631,913.02/78,150.59
  6. Step 6: Final answer
    x = 28,478.76

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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.